A round body that contains DNA and regulates gene expression is the nucleus.
What is a nucleus?The nucleus is а membrаne-enclosed orgаnelle found in most eukаryotic cells. The nucleus is the lаrgest orgаnelle in the cell аnd contаins most of the cell's genetic informаtion (mitochondriа аlso contаin DNА, cаlled mitochondriаl DNА, but it mаkes up just а smаll percentаge of the cell’s overаll DNА content). The genetic informаtion, which contаins the informаtion for the structure аnd function of the orgаnism, is found encoded in DNА in the form of genes.
The function of the nucleus is to mаintаin the integrity of these genes аnd to control the аctivities of the cell by regulаting gene expression. Gene expression is the process by which the informаtion in а gene is "decoded" by vаrious cell molecules to produce а functionаl gene product, such аs а protein molecule or аn RNА molecule.
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Water is known as the universal solvent. One reason water makes a good solvent is because it is composed of polar molecules. What makes a water molecule a polar molecule?.
Water is a universal solvent. The reason water is a good solvent is that it is composed of polar molecules. This makes the water molecule a polar molecule because it has charged (+) and (-) parts. This is possible because the atoms that make up the water molecule (H2O), namely oxygen and hydrogen atoms have distinctive properties.
What is water?Water is a chemical substance with the chemical formula H2O: one water molecule is composed of two hydrogen atoms covalently bonded to one oxygen atom. Physically clean water has no color, no taste, and no smell, namely at a pressure of 100 kPa (1 bar) and a temperature of 273.15 k (0oC).
Water is often called the universal solvent because it dissolves many chemicals. Water is in dynamic equilibrium between the liquid and solid phases under standard pressure and temperature.
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Reading task 1 : Please read the text and answer the 12 questions that follow.
What is your hair texture? You may have wondered why your hair color is just the way it is. Genes make that happen. Living things are different because they have different characteristics. For example microbes such as bacteria, plants, to worms, fungi, algae, millions upon millions of animals. These organisms of the same species together form a population. All the genes in a population is called its gene pool. This can change over time. Generally speaking, the term evolution is “ Change over time.” When the gene pool of a population changes over time, then biological evolution has occurred. Think about a population of goldfish with that solid gold color. Supposed the color changes, then biological evolution has occurred. Biological evolution occurs by four mechanisms: migration, mutation, genetic drift, and natural selection.
A mutation is the change in DNA . Imagine some goldfish with stripes. It could just be a mutation. If the mutation is in the sperm or egg cell, it would certainly be passed on to the next generation leading to biological evolution.
Another mechanism is Migration which is movement into or out of a population. Fish gene pool can change if the population is separated over a long time. Thirdly, Genetic drift is biological evolution by chance. Think about a natural disaster that kills all but a few of the individuals of a population, the next generation would get a different gene pool from the original population just by chance.
Lastly, Natural selection is when physical characteristics that are important for reproduction and survival are passed on more frequently from parent to offspring. The conditions for natural selection is for the organisms to produce more offspring than can survive. However, organisms struggle for existence because there are limited resources limiting them from reproducing to their fullest biotic potential. So, they can not reproduce uncontrollably.
Please respond to the following questions based on the above text
Organisms of the same species together form _____
What is a mutation?
From the passage, you can infer that there are millions of varieties of living things essentially because__
Do you think an animal that CAN NOT blend (camouflage) into its environment will experience natural selection? Explain your answer
According to the passage, how are genes and traits/ characteristics related? Cite evidence from the text to support your answer.
Based on the text, what is the main difference between goldfish with solid gold color and goldfish with stripes?
Making connections between text and world. Use the sentence frame below to make connections with the text.
7.__________ makes me think of ________________ because________-
8.______reminds me of ______________because________.
9. How would natural selection affect the population of striped goldfish if they were better able (than solid goldfish) to avoid predators?
10. If a population is separated over a short time, what would be the effect on its’ gene pool?
11. Compare (SIMILARITY) and contrast (DIFFERENCE) migration and mutation.
12. Describe 3 effects of a sudden decrease in food sources for goldfish in their natural habitat.
Organisms of the same species together form Population.
What is Mutation?Any alteration to a cell's DNA sequence. Mistakes in cell division can result in mutations, as can exposure to environmental DNA-damaging substances.
Mutations may be negative, positive, or ineffective. Mutations that take place in other types of cells are not passed on to offspring; however, if they do so in the cells that produce eggs or sperm, they may be.
Cancer and other diseases may result from specific mutations. A variation is another name for a mutation. A mutation is a change to an organism's DNA sequence.
Therefore, Organisms of the same species together form Population.
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how is energy lost in a food chain?
Answer:
90
Explanation:
Not all the energy is passed from one level of the food chain to the next. About 90 per cent of energy may be lost as heat (released during respiration), through movement, or in materials that the consumer does not digest. The energy stored in undigested materials can be transferred to decomposers.
Answer:
Energy can be lost in a multitude of ways in a food chain. 90% of energy is usually lost either in the form of heat, through movement while using energy, or materials that are not entirely consumed by the consumer.
Explanation:
Only about 10% of energy is retained after a consumer eats a lower level on the food chain. Further explained, heat is released during respiration, which is essentially energy being lost.
Animals also have metabolism and growth, which require energy of their own. So, not all energy in a food chain can be retained for the animals to use.
ID # the structure(s) below that are:
CARBOHYDRATES
SATURATED FATTY ACID
POLYPEPTIDE CHAIN
Below that are one or more polypeptide chain-like structures. An arrangement of amino acids joined covalently by peptide bonds is referred to as a polypeptide chain.
What are polypeptides and what do they do?Polypeptides. Proteins are created by joining several amino acids together to form polypeptides. The bonding connecting two or more protein subunits results in the formation of proteins, after which they are folded into the appropriate shape. Backbone usually accomplished it easiest to see the chain architectures of proteins.
What components make up a polypeptide chain?An linear polymer chain comprising amino acids joined it together with peptide bonds is referred to as a polypeptide. A peptide bond creates an amide by joining the functional group of one antibody to the carboxyl groups of the following amino acid.
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What are the structures that make up a DNA molecule and where does your body get all
the molecules and compounds needed to make DNA structures in all of your body cells?
Explain.
Biological activities of leaf extracts from selectedKalanchoespecies and their relationship with bufadienolides content
Cancer and bacterial infections may be treated using ethanol extract from Kalanchoe blossfeldiana.
What do plants do biologically?Antioxidant, anti-inflammatory, antibacterial, anticancer, immunomodulatory, neuroprotective, antihypertensive, and antidiabetic benefits are just a few of the beneficial impacts that phytochemicals' biological activity has been shown to have.
What exactly is a biological activity test?Bioassays often look at how an entire animal, a tissue or cell line isolated from other animals, or an organism reacts to the substance in order to assess the bioactivity of an extract (or medicine, chemical, or pollutant).
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3. What is the relationship between muscle fatigue and cellular respiration?
Cell Size is Limited by Surface Area
The surface area to volume ratio restricts the size of a cell since a larger cell has less surface area in relation to its size (SA:V).
Cells have varied morphologies. Each cell type contributes differently to the proper functioning of our bodies, and these contributions are made possible by the shapes of the cells. Animal cells can be found in a wide variety of sizes and forms. The maximum size of a cell is determined by the surface area to volume ratio. A smaller cell is more efficient than a bigger cell at transporting goods, including waste products.
Since cells are minuscule, only a trained eye can see them. Despite the apparent logic of an organism consisting of a single large cell, our cells are specialised and perform certain functions within the body. Furthermore, a cell's ability to grow in size is constrained by physiological factors. A cell is exceedingly small on the scale, or in terms of size, relative to other items. This restriction mostly accounts for cells' tiny size.
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All forensic autopsies reveal important information about specific crimes.
True
False
Answer: False
Explanation: While forensic autopsies reveal important information about specific crimes, this is a generalization and not always true. In fact, some autopsies can be incorrect or incomplete and the pathologist may need to wait for lab results to determine cause of death.
Forensic autopsy is an examination of a deceased body to establish the cause and manner of death and to gather evidence that could be useful in a criminal investigation. The primary purpose of forensic autopsy is to provide factual information to support the investigation and prosecution of crimes. This process can identify injuries or marks on the body that may indicate signs of abuse or homicide, or any foreign object or substance that could have caused harm to the person.
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During the cell cycle the cell divides its nucleus and chromosomes during what
During the cell cycle, the cell divides its nucleus and chromosomes during the stage known as mitosis.
What is the Cell cycle?The cell cycle may be defined as the entire sequence of events happening from the end of one nuclear division to the beginning of the next. The complete process of the cell cycle is divided into two phases. They are as follows:
Interphase.M-phase (Division phase).During mitosis, a cell duplicates all of its contents, including its chromosomes, and splits to form two identical daughter cells. Telophase is the fifth and final phase of mitosis, the process that separates the duplicated genetic material carried in the nucleus of a parent cell into two identical daughter cells.
Telophase begins once the replicated, paired chromosomes have been separated and pulled to opposite sides, or poles, of the cell.
Therefore, during the cell cycle, the cell divides its nucleus and chromosomes during the telophase stage of mitosis.
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By what reproductive mechanism does a haplontic animal grow?
A. initially by meiosis, then by mitosis
B. completely by mitosis
C. initially mitosis, then meiosis
D. completely by meiosis
Answer:
B. completely by mitosis
Explanation:
Answer: I think A.initially by meiosis, then by mitosis
Explanation: i hope this helps<3
Which of the following would be an example of hydromodification?
fishing in a stream
adding new fish to a stream
constructing a dam
using water from a reservoir
An example of hydromodification would be constructing a dam (option C).
What is hydromodification?Hydromodification is the alteration of the hydrologic characteristics of bodies of water i.e. the the natural flow of water through a landscape, and often takes the form of channel modification or channelization.
Hydromodification is one of the leading sources of impairment in streams, lakes, estuaries, aquifers, and other water bodies.
Hydromodification activities such as channelization and channel modification, dams, and streambank and shoreline erosion control structures change a water body's physical structure as well as its natural function.
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Is natural selection a biological concept?
Yes, "natural selection" is a biological concept that defines how changes occur over time in the genetic characteristics of a species.
Natural selection describes how the genetic characteristics of a species may change over time, leading to speciation, and the formation of a diverse new species.
Natural selection is an effective notion for understanding the evolution of life that is accepted as a scientific theory. Biologists have found several examples of natural selection affecting evolution. It is now understood to be one of the ways through which life evolves.
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Case Study #2:
A 72-year-old female patient visits her doctor and complains of experiencing pain and
discomfort in her legs. She informs her doctor that the pain worsens after prolong sitting or
standing. The doctor observes her leg and finds that her leg is swollen and appears dark purple
in color. The doctor also uncovers the patient has a high blood pressure. Upon closer observation,
he comes to the conclusion that the veins in her leg are twisted. The doctor believes blood is
collecting in these veins of the leg, giving the leg this dark purple discoloration. In your opinion,
what body systems should the doctor focus on and why?
Upon closer observation, he comes to the conclusion that the veins in her leg are twisted. The doctor believes blood is collecting in these veins of the leg, giving the leg this dark purple discoloration. In my opinion, the body systems the doctor should focus on are circulatory and nervous system.
What is a Varicose vein?This is referred to as a medical condition which is characterized by twisted, enlarged veins caused by weak vein walls and valves.
Vein is a major part of the circulatory system as it carries blood to the heart for oxygenation and it could also affect nerves in the legs which is why the nervous system should be checked.
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the graph shows that as the concentration of sucrose increases from 10 to mmol/L the plant cells
The graph shows that as the concentration of sucrose increases from 10 to mmol/L the plant cells to take in sucrose more slowly.
What is plant cells?Plant cell, the basic unit of all plants. Plant cells, like animal cells, are eukaryotic, meaning they have a membrane-bound nucleus and organelles. The following is a brief survey of some of the major characteristics of plant cells. For a more in-depth discussion of cells, see cell.
Unlike animal cells, plant cells have a cell wall surrounding the cell membrane. Although often perceived as an inactive product serving mainly mechanical and structural purposes, the cell wall actually has a multitude of functions upon which plant life depends. Plant cell walls are composed of cellulose, which sets them apart from other organisms with cell walls, such as bacteria (peptidoglycan) and fungi (chitin). Algal cell walls are similar to those of plants, and many contain specific polysaccharides that are useful for taxonomy.
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What are the main components of the phosphorus cycle?
The main components of the phosphorus cycle include: Phosphorus in the soil, Phosphorus in plants, Phosphorus in animals, Phosphorus in detritus, Phosphorus in water, and Human Activity.
The phosphorus cycle is the process by which phosphorus moves through the environment, including the biosphere, hydrosphere, and geosphere.
1. Phosphorus in the soil: Phosphorus is present in the soil in the form of inorganic phosphates, which can be taken up by plants.
2. Phosphorus in plants: Plants absorb phosphorus from the soil and use it to build nucleic acids, ATP, and phospholipids.
3. Phosphorus in animals: Animals obtain phosphorus by consuming plants or other animals. Phosphorus is an essential component of many biomolecules in animals, including DNA, RNA, ATP, and phospholipids.
4. Phosphorus in detritus: Dead plants and animals are broken down by decomposers, releasing phosphorus back into the soil.
5. Phosphorus in water: Phosphorus can also be present in water as dissolved phosphates. These can be taken up by aquatic plants, and eventually make their way back into the soil via sedimentation.
6. Human activity: Human activities such as mining, agriculture, and waste disposal can also affect the phosphorus cycle. For example, mining of phosphates for fertilizers can remove large amounts of phosphorus from the soil, while agricultural runoff can introduce excess phosphorus into waterways.
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Which one of the following is the correct definition of an ecosystem?AA localized association of several plants and animalsBCommunity of plants, animals, and microbes, interacting with each other and their environmentCCommunity of plants and microbes, plus their environmentDA community of only organisms interacting with one another
Correct definition of an ecosystem is B)Community of plants, animals, and microbes, interacting with each other and their environment. So, correct option is C.
An ecosystem comprises of the natural local area of living organic entities that happen in some specific region, connecting with one another and with the physical and compound variables of that area. These elements are non-living or abiotic factors. An ecosystem is a primary and utilitarian unit of biology where the residing living beings communicate with one another and the general climate. At the end of the day, a biological system is a chain of connections among creatures and their current circumstance.
The construction of a biological system can be parted into two principal parts, to be specific:
Biotic PartsAbiotic PartsThe biotic and abiotic parts are interrelated in an environment. It is an open framework where the energy and parts can stream all through the limits.
Hence, correct option is B.
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(Complete question) is:
Which one of the following is the correct definition of an ecosystem?
A)A localized association of several plants and animals
B)Community of plants, animals, and microbes, interacting with each other and their environment
C)Community of plants and microbes, plus their environment
D)A community of only organisms interacting with one another
The diagram shows embryo development of four different animals.
iS How is this evidence used to suggest that life changes over time?
The genetic inheritance of each of of these species is
exactly the same in the early
stages of development
but then changes as the embryo grows and develops
over time.
Similarities in embryonic development prove that
vestigial structures are common to all species, and life
has changed very little over time.
Lack of homologous structures in later
stages of
embryonic development indicate that each species IS
unique, and a common ancestor
is unlikely.
When there are physical similarities in the early stages
of embryonic development, it suggests that each of the
modern organisms once had a common ancestor.
This evidence is used to suggest that life changes over time, as the genetic inheritance of each species evolves and adapts to its environment.
What is species?
A species is a group of living organisms that are able to interbreed and produce fertile offspring. All members of a species share a set of common characteristics and traits that distinguish them from other species. Species are the basic unit of biological classification and are often given a scientific name. Depending on the species, the members of a species may look similar or be quite different from each other. Species can also be distinguished from each other by their behaviour, habitat, diet, and other characteristics. Species are a fundamental part of the natural world and are integral to the health of all ecosystems. Understanding the different species and their roles in the environment is essential for preserving biodiversity and maintaining a healthy planet.
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Who demonstrated that dna is the genetic material of the t2 phage?
Classical experiments carried out by Hershey and Chase proved that the T2 phage's genetic makeup is DNA.
Because DNA seemed to be an inert molecule and because it is found in the nucleus, it was thought that since it is there it serves as phosphorus storage. Despite the fact that DNA had been known to biologists since 1869, many scientists at the time still believed that proteins carried the information for inheritance. In their experiments, Hershey and Chase demonstrated that while most of the protein in bacteriophages, which are made up of DNA and protein, does not enter the host bacterial cell when they infect bacteria, their DNA does. DNA is the hereditary material, as demonstrated by Hershey and Chase and subsequent discoveries.
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Hydrophobic substances like salad oil are:
Answer: Molecules that are nonpolar and resist water molecules.
Explanation:
Hydrophobic substance like salad oils are the molecules that are nonpolar and resist water molecules.
Carbon and hydrogen atoms, which exchange electrons almost evenly and form nonpolar covalent bonds, make up the majority of the atoms in salad oil. Hydrophobic substances are those that lack an affinity for water while having a lot of nonpolar connections and being nonpolar ("water-fearing"). Because polar bonds cause atoms to have partial charges, substances that possess polar bonds are hydrophilic, or "loving water." For instance, the oxygen atom in a water molecule can create a hydrogen bond with a hydrogen atom that has a partial positive charge on it.
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According to the Neonatal Resuscitation Program 8th Edition
Ideally, how quickly should the intubation procedure be completed?
A. 30 seconds
B. 40 seconds
C. 60 seconds
D. 90 seconds
The intubation process must be finished in less than 60 seconds. Hence, Option C is correct
Intubation should be finished within 60 seconds, according to the Neonatal Resuscitation Program 8th Edition. This is because intubation—a crucial step in resuscitating an infant—may be compromised by delays of more than 60 seconds. Additionally, the infant's oxygenation and breathing status may be impacted by a delay in intubation. Since time is of the essence, it is crucial that the intubation operation be finished as soon as possible. The new version offers a cutting-edge curriculum that consists of two types of NRP providers, two recommended instructor-led Provider Course forms, RQI® for NRP®, and a number of major practice modifications for patient safety and educational efficacy.Learn more about Intubation Procedure:
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Which statement correctly describes the mesosphere? (1 point) O The Northern Lights are visible in this layer. Atmospheric changes in this layer cause weather at Earth's surface. O Commercial airplanes fly through this layer. O Meteors burn up in this layer to create shooting stars.
Answer:
Meteors burn up in this layer to create shooting stars.
Explanation:
The mesosphere is a layer of the Earth's atmosphere that is located between the stratosphere and the thermosphere. It is the layer where most meteors burn up upon entering the Earth's atmosphere, creating shooting stars. The mesosphere is located at an altitude of about 50 to 85 kilometers above the Earth's surface. The layer is relatively thin and has low temperatures, and thus, it does not have much weather-related activity. The Northern lights are visible in the thermosphere, not in the mesosphere. Commercial airplanes fly through the lower layers such as the stratosphere, not the mesosphere.
Can somone please help me with this??
control group: group that is not given special juice
independent variable: time
dependent variable: number of papers stacked
Antiviral drugs may target the following except
A. uncoating.
B. nucleic acid synthesis.
C. viral assembly.
D. viral ribosomes.
E. uncoating, nucleic acid synthesis AND viral assembly.
Answer: A.
Explanation: Because Antiviral drugs DOES NOT target other peoples bodies.
The toxic buildup of waste products in the bloodstream is a condition known as nephritis.truefalse
The statement "The toxic buildup of waste products in the bloodstream is a condition known as nephritis" is false. The toxic buildup of waste products in the bloodstream is a condition known as uremia.
Nephritis is а set of diseаses thаt cаuse inflаmmаtion of the renаl glomeruli, which аre kidney structures responsible for eliminаting toxins аnd other components of the body, such аs wаter аnd minerаls. In these cаses the kidney hаs less аbility to filter the blood.
Bаsed on this, we cаn stаte thаt the stаtement mаde in the аbove question is fаlse since nephritis does not refer to the toxic аccumulаtion of wаste products in the bloodstreаm, аlthough this is а consequence of nephritis.
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What will happen to the rate of photosynthesis if the light intensity is increased?
A) It will be higher.
B) It will be lower.
C) It will be the same.
It will be higher (A)
Explanation:
Photosynthesis is the process of plants making food (glucose) using light therefore more light = more food
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Describe how information for specific traits of an organism are carried by the DNA .
All of the information for your physical traits is carried by DNA, which is mostly dictated by proteins. The instructions for creating a protein are included in DNA. Each protein in DNA is encoded by a gene (a specific sequence of DNA nucleotides that specify how a single protein is to be made).
The arrangement, or sequence, of the nucleotides along each strand of DNA encodes information. Each base—A, C, T, or G—can be thought of as a letter in a four-letter alphabet that, in the chemical structure of the DNA, writes out biological signals.
Like chromosomes, genes also occur in pairs. Each of your parents has two copies of each of their genes, and each parent passes on just one copy to you.
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Use a Punnet square to predict the results of a dihybrid cross and state phenotype and genotype ratios of F2 generation.
In a dihybrid cross between two parents who are homozygous for both features, the average phenotypic ratio for the F2 generation is 9:3:3:1.
How can you predict genotypes and phenotypes using Punnett squares?The alleles of the other parent are put over the top of the Punnett square, and the potential allele pairs for one parent are printed down the left side of the table.
What is the dihybrid cross' genotypic to phenotypic ratio?In the traditional Mendel experiment, the dihybrid cross's phenotypic ratio is 9:3:3:1. In this instance, the two allelic pairs assort into the gametes independently. The genotypic ratio of a dihybrid cross is 1:2:2:4:1:2:1:2:1.
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victims of drowning who have stopped breathing are sometimes revived by a process called artificial respiration. Suggest why a biologist would object to the use of this expression. (Resuscitation is a better word to use.)
When a person experiences a drowning incident and stops breathing, immediate intervention is necessary to provide oxygen to the brain and other vital organs to prevent permanent damage or death.
Traditionally, this intervention has been called "artificial respiration" or "mouth-to-mouth resuscitation," where a person provides breaths to the victim by blowing air into their mouth to mimic the process of respiration. However, the term "artificial respiration" can be misleading because the action performed during resuscitation is not a complete replacement of the biological process of respiration as it occurs naturally in a living organism. Instead, it is an external intervention to provide oxygen to the victim until they can resume normal breathing on their own.
A more accurate and biologically precise term for this intervention is "resuscitation" or "cardiopulmonary resuscitation" (CPR). Resuscitation involves a combination of chest compressions to maintain blood circulation and rescue breaths to provide oxygen to the victim. By using the term "resuscitation," biologists and medical professionals can better convey the concept that the goal is to restore the natural processes of breathing and circulation, rather than implying the creation of an entirely "artificial" biological function.
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summarize how tropism demonstrates a plant’s response to external stimuli.
The tarism of plants tropism is the term used to describe how plants respond to external stimuli by turning, moving, or growing. When the prize for the best-looking plant is given out, the tropic al plant turns to face the audience while grinning (tropism).
Tropism describes the movement of a plant's growth in reaction to an external stimulation. Tropism is particular to the stimulus's direction. In reaction to a stimulus, plants can either show a negative or positive movement.
1. Common tropic responses in plants include phototropism, thigmotropism, gravitropism, hydrotropism, and thermotropism.
2. Plants are sessile, which makes them different from humans and other animals in the way they adapt to their surroundings.
3. Positive tropism is growth that occurs in the direction of the stimuli, whereas negative tropism is growth that occurs in the opposite direction.
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