Two atoms of element A unite to form a molecule with the formula A₂. The bond between the atoms in the molecule is nonpolar covalent.
Only nonmetаls cаn combine to form molecules of the type А₂ (e.g. F₂, Cl₂, Br₂, I₂, H₂, O₂, N₂). When nonmetаls combine with nonmetаls, they shаre pаirs of electrons to fulfil the octet's rule. The bond in which elements shаre electrons is known аs covаlent.
The polаrity of the covаlent bond depends on the difference in the electronegаtivities of аtoms thаt form it. Since А₂ is formed by 2 аtoms of А (sаme electronegаtivity), the difference in their electronegаtivities is zero аnd the bond is clаssified аs nonpolаr.
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Match the hormones with their roles in breastfeeding: Mammary gland growth
Milk production and storage
Milk let-down
Mammary gland shrinkage
=Prolactin
= Oxytocin
= Estrogens
= Progesterone
Mammary gland growth - estrogen
Milk production and storage - prolactin
Milk letdown - oxytocin
Mammary gland shrinkage - progesterone
When a baby suckles, it stimulates tiny nerves. This releases two of her hormones, prolactin, and oxytocin, into the bloodstream. Prolactin promotes milk production, and oxytocin promotes milk production. Breast milk is then released or expelled from the nipple. Estrogen is essential for MG growth, both in pubertal ductal dilatation and in alveolar development during pregnancy. Breast tissue prepared for milk production shrinks and loses its shape. Because of progesterone.
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What are the general climate conditions in much of eastern europe?
Climatic conditions in most of eastern Europe are subarctic climates.
What is climate?Climate is the habit and character of the weather that occurs in a place or area. The time period used as a reference for determining the average climate is 30 years. The constituent elements of climate are the same as the weather.
In Northern Europe, Eastern Europe, the Alps, and several other highlands have a subarctic climate. Subarctic climates are climates characterized by long, usually very cold winters, and short, cool to mild summers.
In winter, subarctic climates have short days and very long nights. Winter in subarctic climate areas at night can reach extreme temperatures of up to -20 to -50° Celsius.
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The diagram represents three section of a cell membrane showing three different methods involved in the transport of various molecules across the membrane
Methods A and B are classified as a methods of passive transport because they do not require
1) ATP
2) carbon dioxide
3) light
40 DNA
Answer:
1
Explanation:
5
RNA that has hydrogen bonded to itself forms a promoter sequence. terminator sequence. termination protein. stem loop.
Answer:
yes
Explanation:
yes RNA that has hydrogen bonded to itself forms a promoter and Terminator sequence
What 2 reflex actions when we swallow steer the food into the esophagus?
The esophagus, a muscular tube with the ability to collapse, connects the pharynx to the stomach.
What is Esophagus?It is anterior to the vertebral column and posterior to the trachea as it descends. It empties into the stomach after passing through the esophageal hiatus, a hole in the diaphragm.
In order to maintain the lining moist and well lubricated to facilitate the passage of food, the mucosa possesses glands that generate mucus. Food enters and exits the esophagus under the control of the upper and lower esophageal sphincters.
The esophagogastric junction is home to the lower esophageal sphincter, which is also known as the cardiac sphincter.
Therefore, The esophagus, a muscular tube with the ability to collapse, connects the pharynx to the stomach.
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Why is visualization not sufficient to properly identify bacteria?
A. Bacteria have a limited set of shapes.
B. Identification is only needed in clinical specimens.
C. Many unrelated bacteria can share the same shape.
D. Bacteria have a limited set of shapes and many unrelated bacteria share the same shape.
E. Not all bacteria can be seen with a light microscope.
Visualization not sufficient to properly identify bacteria the correct option is (D). Bacteria have a limited set of shapes and many unrelated bacteria share the same shape.
Some bacteria, known as vibrio, have comma- or rod-like shapes; others might have spiral or tightly wound shapes, known as spirilla or spirochaetes. A few more uncommon shapes, including microorganisms in the form of stars, have been described.
Numerous bacterial species only exist as solitary cells, while others create distinctive associations. For example, Neisseria forms diploids (pairs), streptococci form chains, and staphylococci cluster into "bunch of grapes"-like clusters.
Soil, water, acidic hot springs, radioactive waste, and the deep biosphere of the Earth's crust are all home to bacteria. Through the recycling of nutrients, such as the fixation of nitrogen from the atmosphere, bacteria are essential at many phases of the nutrition cycle. The decomposition of dead corpses is a part of the nutrient cycle; bacteria are in charge of the putrefaction phase of this process.
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Which agricultural inventions prompted the Sung dynasty’s population growth?
Select all that apply.
Responses
New irrigation techniques were used.New irrigation techniques were used.
New strains of rice were grown.New strains of rice were grown.
New methods for breeding livestock were used.New methods for breeding livestock were used.
New strains of wheat were grown.
In addition to early ripening and drought-resistant types, farmers also created rice that was suitable for brewing and other specialized uses.
What is the procedure for brewing?Malting, milling, mashing, extract separation, hop addition and boiling, hop removal and precipitates removal, cooling and aeration, fermentation, yeast separation from young beer, age, and maturation are all steps in the brewing of beer.
What does the word "brew" actually mean?A transitive verb that means to steep, boil, and ferment (beer, ale, etc.) or to infuse and ferment. It also means to foment.
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Who observed the variation of organism in Gala?
Charles Darwin observed the variation of organisms in the Galápagos Islands during his voyage on the HMS Beagle in 1835.
Charles Darwin's observations of the variation of organisms in the Galápagos Islands, greatly influenced his theory of evolution by natural selection. While exploring the various islands in the Galapagos, Darwin noticed that the animals and plants on each island had slight differences from the same species on other islands.
This led him to conclude that the differences were caused by the different environments on each island, and that this could lead to the evolution of new species over time. This observation was a major factor in the development of Darwin's theory of evolution by natural selection, which has since become one of the most widely accepted theories in the field of biology.
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OtWhich part of the cell theory did Schleiden help establish with his observation of plant material?
O A. Cells were named by Robert Hooke.
OB. Nonliving things are made up of cells.
OC. All cells come from existing cells.
O D. All organisms are made of one or more cells.
Answer:
C. All cells come from existing cells.
Explanation:
Schleiden observed plant material and concluded that all plant tissue was made up of cells, which helped to establish the cell theory that all cells come from existing cells.
Some proteins are destined to stay in the cell, while others are to leave the cell (secretion).
Are these two types of proteins produced in loose ribosomes? Explain.
Both types of protein can be produced by ribosomes, however, proteins that are destined to be secreted are often produced by ribosomes that are attached to the endoplasmic reticulum.
How do cells determine which proteins are destined to stay within the cell and which are to be secreted?Cells determine which proteins are destined to stay within the cell and which are to be secreted through the use of a process called protein sorting. This process occurs during protein synthesis and involves the addition of specific signals or tags to the protein, such as a signal peptide or a transmembrane domain. These signals act as a sort of "address label" that directs the protein to its proper destination within the cell or out of the cell through the secretory pathway. Proteins that are not tagged for secretion will typically remain within the cell and may serve a variety of functions such as enzymes, structural proteins, or regulatory proteins.
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Mitosis is a kind of
A. cell division
OB. nuclear division
OC. cell addition
O D. cell respiration
Answer:
A. Cell division
Explanation:
What is mitosis? Mitosis is a type of "cell division" in which one cell (the mother) divides to produce two new cells (the daughters) that are genetically identical to itself.
Dietary ___ is a tough complex carbohydrate that the body is unable to digest.
Answer:
fiber
Explanation:
Fiber is a type of carbohydrate that the body can't digest. Though most carbohydrates are broken down into sugar molecules called glucose, fiber cannot be broken down into sugar molecules, and instead it passes through the body undigested
Ms. Green's biology students were studying cellular respiration. Using baking yeast to test the rate of fermentation, student groups mixed yeast with different manipulated variables. The groups used the height of the carbon dioxide bubbles produced in a test tube to determine which variable(s) produced the highest rate of fermentation.
Ms. Green's biology students were studying cellular respiration. Using baking yeast to test the rate of fermentation, student groups mixed yeast with different manipulated variables. The groups used the height of the carbon dioxide bubbles produced in a test tube to determine which variable(s) produced the highest rate of fermentation. Students hypothesized that adding lactose to a sixth test tube would produce the greatest amount of carbon dioxide.
Respiration is a process of overhauling complex organic molecules to produce energy. One type of respiration without oxygen, namely anaerobic respiration, will break down glucose to release stored energy. Anaerobic respiration occurs when the body needs energy quickly.
An example of anaerobic respiration alcohol fermentation using yeast. When approached, enzymes in yeast will analyze it with starch and sugar so that a decarboxylation process occurs when pyruvic acid from glucolysis breaks down carbon dioxide and carbonate groups to form acetaldehyde. Energy and carbon dioxide will be formed after acetyldehyth is reduced. Therefore the addition of lactose will produce the largest amount of carbon dioxide because lactose is a sugar molecule that is a food source for yeast.
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Plasmodial slime mold is an example of a multinucleated cell.a. Trueb. False
Plasmodial slime mold is an example of a multinucleated cell. It can be referred to as "one huge cytoplasmic mass with many nuclei" as seen to the right.
What are slime molds classified as?Slime molds are classified in the Kingdom Protista (the Protists), despite many years of having been classified as fungi, in the class Myxomycetes. This change in classification resulted from research that yielded new information about their biology and phylogeny.
Why are Plasmodial slime mold not multicellular?Plasmodium slime molds are unicellular when there is the availability of food. However, when the nutrients become scarce in the environment, these single-celled slime molds congregate to form a body and move around in search of food as the congregate form can detect airborne chemicals.
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PLS HELPP I DONT KNOW WHAT TO DO!!
Can some help me please
The parts of Adenosine Tri Phosphate (ATP) molecules include adenine, ribose and phosphate groups.
What is the purpose of ATP?Cells consume and store energy from adenosine triphosphate (ATP), which is the energy source. Adenine, ribose, and three serially bound phosphate groups make up the structure of ATP, which is a nucleoside triphosphate. The ATP that is produced during food digestion is what animals use to store their energy. Similar to this, plants use ATP molecules to store the energy they obtain from light during photosynthesis.
Where does ATP contain its energy?In ATP, the bonds holding the phosphate groups together serve as energy storage. More specifically, ATP's second and third phosphate groups are where the energy is kept. The third phosphate group separates from ATP when the cell needs energy, releasing energy in that bond.
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Draw a picture showing PHOTOSYSTEM PS1
Photosystem PS1 is a photosystem found in the thylakoid membranes of chloroplasts in plants and other photosynthetic organisms.
What exactly are photosynthetic organisms?
Photosynthetic organisms are organisms that can produce their own food through the process of photosynthesis. This process involves the use of light energy to convert carbon dioxide and water into glucose (sugar) and oxygen. Photosynthetic organisms include plants, algae, and some bacteria.
Photosystem PS1 is the primary photosystem in plants and other photosynthetic organisms. It is composed of two membrane-bound proteins, called photosystems, that contain light-harvesting complexes and a reaction center. The light-harvesting complexes absorb energy from sunlight and direct it to the reaction center, where it is used to produce ATP and NADPH, the molecules needed for photosynthesis. The products of photosystem PS1 are then used to drive the second photosystem, PS2, which produces the end products of photosynthesis.
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two uses of carbohydrate made in photosynthesis?
Two uses of carbohydrate made by photosynthesis are Source of energy and usage in biochemical synthesis.
Carbohydrate is one of most essential nutrient for most of the organisms. It is made after plant performs photosynthesis. It has many usage in plants which includes source of energy, biochemical synthesis, repairing of leaf cells and building of cellular structure etc.
Source of energy : Carbohydrates are a rich source of energy in plants, they store carbs in the form of starch and sugar which gives plants surplus supply of energy.Biochemical synthesis : Breakdown of carbs creates other essential chemicals and compounds which are essential for biochemical processes in plants.Learn more about Carbohydrates here,
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Explain what happens to the percentage stomatal opening when plant roots are partially exposed to
water compared to when they are fully exposed to water. Justify your answer using the graph above.
Through their stomata, plants transpire their water in the form of vapor or gas. Stomatal transpiration, or between 50 and 90 percent of all transpiration, loses the most water.
How do stomata respond to water status?
We still don't have a complete mechanistic knowledge of how stomatal responses to humidity, soil moisture, and other factors that affect plant water status affect photosynthesis, productivity, water production, ecohydrology, and climate forcing. Here, I go over earlier and more current developments in stomatal water interactions. The synthesis of abscisic acid in leaves may play a role in the metabolically mediated response to leaf water status in stomatal responses to evaporative demand and soil drought. Humidity, light, and temperature responses may also be influenced by additional speculative mechanisms involving vapor and heat transfer within leaves, although these mechanisms need more theoretical development and experimental verification..
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What happened in the F2 generation of Mendel's crosses?
Answer:
from the F1 generation the cross pollination of two parent which contain all purple flower.In the F2 generation from self pollination of F1 plants and contain 75% purple flower and 25% white flowers
If the original parent cell has 64 chromosomes, how many chromosomes will each cell have after the second meiotic division
Answer:
the correct answer is 32 because it splits evenly
Answer:
At the end of mitosis, the two daughter cells will be exact copies of the original cell. Each daughter cell will have 30 chromosomes. At the end of meiosis II, each cell (i.e., gamete) would have half the original number of chromosomes, that is, 15 chromosomes.
Explanation:
hairlike processes that project from epithelial cells; help propel mucus, dust particles, and other foreign substances from the respiratory tract
It is true that, Epithelial cells form hairlike processes that help expel mucus, dust, and other foreign items from the respiratory tract.
Cilia, which resemble hairs, line the mucous membrane and transport mucus-trapped particles outside the nose. The tissue that lines the nasal cavity moistens, warms, and purifies the air that is inhaled. On the outside of airway cells, cilia are movable, tiny projections that resemble fingers.
The cilia that line the airways aid in raising and expelling mucus from the lungs. One of the defense systems of the respiratory system is represented by cilia, small muscular projections that resemble hairs on the cells lining the airway. A liquid mucus film that coats the airways is propelled by cilia.
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Correct Question:
State true or false: hairlike processes that project from epithelial cells; help propel mucus, dust particles, and other foreign substances from the respiratory tract.
what is the term for inanimate objects that harbor microorganisms that contribute to environmental contamination?
The term fomite inanimate objects harbor microorganisms that contribute to environmental contamination.
Inanimate items that are capable of carrying and spreading illness and infectious agents are referred to as fomites. It's possible to refer to fomites as passive vectors as well. There is a vast variety of commonplace items that have the potential to become fomites if they come into touch with infectious agents such as germs, viruses, bacteria, or fungi.
Certain infectious diseases are more likely to be passed on via fomites than others. However, the likelihood of bacteria on a fomite being able to successfully transmit to a human is contingent upon a number of conditions.
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If 5 waves passes through a certain point in 1 second the frequency of this wave is
The frequency of the wave as he passes through a certain point is 5 waves per seconds.
What is frequency?Frequency is the amount of complete cycle completed by a wave in one seconds.
To calculate the frequency of the wave, we use the formula below.
Formula:
f = n/t..................... Equation 1Where:
f = Frequencyn = Number of wavet = Time in secondsFrom the question,
Given:
n = 5 wavest = 1Substitute these values into equation 1
f = 5/1f = 5 waves per secondsHence, the frequency of the wave is 5 waves per seconds.
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The frequency of this wave is 5 waves per second, or 5 hertz (Hz).
What is the frequency of wave, f ?This refers to the number of waves passing a point in a second. The unit of frequency is measured in hertz (Hz). One hertz is equal to one wave per second.
To calculate the wavelength and speed of a wave, these can be used to find the frequency of a wave:
f = v λ
where
λ = the wavelength in meters
v = the speed of the wave in m/s.
This also gives the frequency of the wave in Hertz.
From the question:
f = 5
Hence, If 5 waves passes through a certain point in 1 second the frequency of this wave is 5 hertz (Hz).
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thank you very much thank you
Answer: D
Explanation:
cuz i took the test
Pretend you are MEIOSIS. Write a letter to your body letting it know how important MEIOSIS is for your body to function and carry out life. You must include the following words: gametes, haploid, diploid, chromosomes, crossing-over, fertilization.
The letter to my body letting it know how important MEIOSIS is for your body to function and carry out life is written below.
The letter to my bodyDear body,
Meiosis here, writing to remind you of the essential part I play in your capacity to operate and go about living your life. Without me, it would not be possible to produce genetically different gametes, which are the reproductive cells.
As you may know, one of my main responsibilities is converting a cell's diploid to haploid chromosome count. For gametes to develop into healthy, viable individuals, cell division is necessary. The process of fertilization and subsequent life-cycle continuation would not be possible without chromosomal reduction.
Through the process of crossing-over, in which genes from various chromosomes can be transferred, genetic diversity is also expanded during my process. As a result, each gamete develops a distinctive combination of genetic information, which is essential for the survival of subsequent generations.
In a nutshell, my job in your body is to reduce the number of chromosomes and facilitate crossing-over so that healthy, genetically varied gametes are produced. Fertilization and life's continuation would not be conceivable without me. To ensure that I can continue to perform my duties effectively, please remember to take good care of both me and the cells I deal with.
Yours Sincerely,
Meiosis
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Classify make a table with two columns-labeled haploid and diploid-and assign each of the following structures from the pine life cycle to the appropriate column: pollen tube, seed cone, embryo, ovule, and seeding
The haploid cells are the pollen tube, seed cone, and the seedling, while the diploid cells are the embryo and the ovule, and the haploid has the half set of the genetic contents while the diploid has the double set.
What is the significance of the haploid cells?The haploid cells are important as they are the gametes that have the capacity to form the zygote, and they can be either sperm or an ovule. So the haploid cells, which are the male and female gametes, combine to make the diploid cells.
Hence, the haploid cells are the pollen tube, seed cone, and the seedling, while the diploid cells are the embryo and the ovule, and the haploid has the half set of the genetic contents while the diploid has the double set.
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how would you define a fruit? how can fruit be helpful in seed dispersal?
Answer:
Defined: the sweet and fleshy product of a tree or other plant that contains seed and can be eaten as food.
These fruits, including the seeds, are eaten by animals who then disperse the seeds when they defecate
Explanation:
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What were the original inhabitants of australia called?
The original inhabitants of Australia are known as Indigenous Australians. They have a rich culture and history that stretches back more than 60,000 years. Indigenous Australians are made up of many different groups, each with their own unique language, customs, and traditions. They were hunter-gatherers and had complex societies, spiritual beliefs, and trading networks. They have been the custodians of the land and the culture for millennia and continue to play a significant role in the country's history, culture and identity.
which part of your brain is involved in your motivation?
The anterior cingulate cortex as well as the dorsolateral prefrontal cortex are the main neural circuits related to the regulation of motivation.
Motivation can be passed into the three sub processes i.e a process of regulating motivation, maintaining motivation as well as generating motivation.
A tentative neuroscientific model of motivational processes which consists of three distinct but continuous sub processes, namely value-based decision-making, reward-driven approach, and goal-directed control. This process will recruits the ventral striatum (reward area) in which basic stimulus-action association is formed, and it is classified as an automatic motivation to which relatively less attention is assigned. The neuroscientific model of motivational process suggests several educational implications like; maintenance, generation, and regulation of motivation to learn in the learning environment.
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