What are two importance of variation
It helps a species survive, it also helps us distinguish who is who, it helps creatures adapt to their surroundings as well as changes that occur in the environment, but it also helps a species emerge strong if natural selection favours it.
Is it important to have variety in our everyday lives?It benefits a population because it allows a small number of people to adapt to environmental changes, allowing the population to survive.
Different phenotypes can be introduced into an organism via genetic changes that modify gene activity or protein function. If a characteristic is beneficial and aids an individual's survival and reproduction, the genetic variation is more likely to be handed on to the following generation (a process known as natural selection).
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How much vigorous physical activity do adults need each day?
Any activity that moves your body counts as physical activity. The current Physical Activity Guidelines state that people need 150 minutes of moderate-intensity physical activity and 2 days of muscle-building activity each week.
every week on two or more days that involve all the major muscle groups (legs, hips, back, abdomen, chest, shoulders, and arms). You will experience even greater health benefits if you engage in more than 150 minutes of moderate-intensity exercise per week, 75 minutes of strenuous exercise per week, or an equivalent mix. aerobic exercise
A general guideline is that 1 minute of strenuous activity is equivalent to 2 minutes of moderate activity. Some people enjoy engaging in strenuous exercise since it provides them with roughly the same health advantages in half the time.
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Answer:The correct answer is- 150 minutes per week
Explanation:Physical activity is important for every person to remain fit and for their well being. For more health benefits duration and intensity of physical activity should be maintained. Adults should do at least 150 minutes of moderate physical activity per week or 30 minutes 5 days a week. In the case of vigorous-intensity physical aerobic activity, at least 75 minutes per week should be given by an adult to gain substantial health. Adults can increase the intensity and time according to their adaption to gain more physical fitness. So the right answer is 150 minutes per week.
Green pod is the dominant trait, and yellow pod is the recessive trait for pod color in pea plants. What did Mendel discover in his first round of experiments when he crossed true breeding plants with green pods with true breeding plants with yellow pods?
A. All of the offspring had green pods, and the yellow pod trait seemed to disappear.
B. Half of the offspring had green pods, and the other half had yellow pods.
C. All of the offspring had spotted yellow and green pods.
D. One-fourth of the offspring had yellow pods, and three-fourths had green pods.
the answer is A because green is the dominant trait
Which of the following provides molecular evidence that signal transduction pathways evolved early in the history of life?
Answer:
Which of the following provides molecular evidence that signal transduction pathways evolved early in the history of life? The molecular details of cell signaling are quite similar in organisms whose last common ancestor was a billion years ago.
What is it called when there are two identical alleles?
When an organism has two identical alleles for a particular gene, it is called homozygous for that gene.
Homozygous means that the two alleles of a gene are the same, and will express the same trait. For example, if an organism has two alleles for seed color in a plant, and both alleles are for the dominant trait of yellow, the organism will be homozygous for seed color and will produce yellow seeds.
It's worth noting that not all traits are determined by a single gene and that some traits are determined by multiple genes, in that case, homozygosity will be in all the genes involved in the trait.
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An archer hoot arrow at a target. The ditance Xcm from the center of the target at which the arrow trike the target ha pdf, f, defined by
f(x)={1/10*e^-x/10 x>0
{0 otherwie
An arrow core 8 point if X<=2, 5 point if 2
An archer hoot arrow at a target with expected value E(X) = 6.7.
EXPECTED VALUE OF SCORE≤ X ≤ 6, and 2 point if X > 6.
What is the expected number of points scored by the archer?
The expected number of points scored by the archer can be calculated by multiplying the probability density function (pdf) of the distance X by the point value at each distance and then summing the results. This is known as the expected value.
E(X) = (1/10e⁻²/108) + (1/10e⁻⁶/10 - 1/10e⁻²/10)5 + (1 - 1/10e⁻⁶/10) × 2
Expected value E(X) = 6.7
The expected score is the sum of all possible scores multiplied by their respective probabilities. It can be calculated by integrating the product of the score function and the probability density function over the entire range of possible values of the variable.
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Explain many ways that humans can help ecosystems remain sustainable.
Answer:
Humans can help ecosystems remain sustainable in many ways. For example, we can reduce our consumption of resources and opt for eco-friendly alternatives. We can also minimize our use of plastic and purchase items made from recycled materials. Additionally, we can conserve energy by using energy-efficient appliances, taking shorter showers, and turning off the lights when leaving a room. Furthermore, we can reduce our carbon footprint by using public transportation, carpooling, or riding a bicycle instead of driving. Finally, we can help by participating in conservation efforts and volunteering with organizations that are working to protect and preserve the environment. By taking these simple steps, we can help ensure a more sustainable future for our planet.
In part of the model, materials move out of the bag and into the water. Which cell process does this best model
Since within part of the model representing the cell membrane and materials move out of the bag and into the water, the cell processes which this best model include the following: B. Small molecules easily pass between the phospholipids in the cell membrane.
What is a cell membrane?In Science, a cell membrane is sometimes referred to as plasma membrane and it can be defined as a semi-permeable cell organelle that is found in the body of a living organism.
Generally speaking, the cell membrane simply refers to a semi-permeable and hydrophobic organelle (lipid bilayer) that is saddled with the responsibility of eliminating waste products from the body of a living organism or entry (passage) of useful products into the body of a living organism.
In this context, we can reasonably infer and logically deduce that a fabric of this bag representing cell membrane allows small molecules to easily pass between the phospholipids which is found within the cell of all living organisms.
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Complete Question:
A tea bag can model a cell. The fabric of the bag represents the cell membrane. In part of the model, materials move out of the bag and into the water. Which of the following cell processes does this best model?
A. A vacuole opens to release substances into the area outside the cell
B. Small molecules easily pass between the phospholipids in the cell membrane.
O C. Substances move from an high concentration of low concentration to an area of
O D. Transport proteins use energy to push large molecules across the cell membrane
blood is a fluid connective tissue that contains cells as well as an extracellular matrix called ____
Answer:
Plasma
Explanation:
making blood unique among connective tissues because it is fluid.
Match the neuron type with its function.
Drag statements on the right to match the left.
Sensory (afferent) neuron
Motor (efferent) neuron
Interneuron
Located in PSN; carry impulses away from the CNS
C-a Located in PNS; carry impulses toward the CNS
Located in the CNS: integrate sensory signals
Sensory neurons located in the PNS transmit impulses to the CNS.
Unipolar cell bodies of sensory neurons are located in the sensory ganglia and may lie along spinal roots or cranial nerves.
Sensory neurons are nerve cells that are activated by sensory input from the environment. For example, touching a hot surface with a fingertip fires sensory neurons.
Sensory nerves carry signals to the brain that help us touch, taste, smell, and see. Motor neurons carry signals to muscles and glands that aid movement and function.
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assembles some components of the cell membrane synthesizes lipids
The component of the cell membrane that synthesizes lipids is the Endoplasmic Reticulum.
How are cell membranes synthesized?Cells hаve extensive sets of intrаcellulаr membrаnes, which together compose the endomembrаne system. The endomembrаne system includes the endoplаsmic reticulum (ER), Golgi аppаrаtus, аnd lysosomes. Vesicles аlso аllow the exchаnge of membrаne components with а cell's plаsmа membrаne.
Membrаnes аnd their constituent proteins аre аssembled in the ER. This orgаnelle contаins the enzymes involved in lipid synthesis, аnd аs lipids аre mаnufаctured in the ER, they аre inserted into the orgаnelle's own membrаnes. This hаppens in pаrt becаuse the lipids аre too hydrophobic to dissolve into the cytoplаsm.
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were doing a review sheet for an upcoming test I heed hep
1. Nucleus control most cell processes and contains DNA.
What are the functions of nucleus?Nucleus is the structure in a cell that contains the chromosomes. The nucleus has a membrane around it, and is where RNA is made from the DNA in the chromosomes.
The primary function of the nucleolus is in facilitating ribosome biogenesis, through the processing and assembly of rRNA into preribosomal particles.
The nucleus is like the remote control center of the cell. It acts as the cell's brain by telling it what to do, how to grow, and when to reproduce. The nucleus is home to the cell's genes.
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Which statement is TRUE about the molecule glucose?
•It is a simple carbohydrate that serves as the monomer for complex carbohydrates
•It is a simple protein that serves as the monomer for complex proteins
•It is a product of aerobic cellular respiration
•It is a reactant of photosynthesis
Please help with completing this chart it dues tmr PLS
If a photo of earth was taken 25 million years from now from space, would the landmasses appear the same as they currently are or different? why do you think this?.
The effects of weathering, erosion would cause them to appear different. A lot would change, especially throughout 25 million years, because as land would either weather away & otherwise shift in oceans or on land.
Do you believe that the landmasses of the Earth are still shifting?Even now, the continents are all still shifting. Seafloor spreading zones as well as enormous rift valleys are some of the most active tectonic sites. Molten rock rises from deep within the Earth during seafloor spreading, adding new seafloor (oceanic crust) towards the edges of the old.
What is the Earth a planet?Our home planet, Earth, is a world unto itself. Earth, this same third planet from the sun, is the only place inside the known universe where the presence of life has been confirmed. With a 3,959-mile radius, Earth is the fifth-largest planet within our solar system and the only one whose surface is known to contain liquid water.
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The law of segregation states that every organism possesses a pair of?
Mendel's law of segregation states that individual alleles segregate during gametogenesis. Mendel crossed the True Breeding High Plant (TT) with the True Breeding Short Plant (TT). This cross (F1 generation) gave only large plants with the Tt genotype.
Mendel's law of segregation
Mendel's law of segregation states:
"During gamete formation, each gene segregates from each other, so that each gamete carries only one allele for each gene." The law of segregation is the second law of heredity. According to the law of segregation, only one of the two gene copies present in an organism is distributed to each gamete (egg or sperm cell) it produces, and the distribution of gene copies is random.
The law of segregation dictates that all diploid individuals have a pair of alleles (copies) for a particular trait. Each parent randomly passes one allele of her to its offspring, resulting in a diploid organism. Alleles containing dominant traits determine offspring phenotypes.
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Apply evolutionary psychology to explain why a child might be afraid of snakes the first time she encounters one.
Evolutionary psychology suggests that certain fears, such as a fear of snakes, may be innate in humans because they were beneficial for survival in our evolutionary history. Snakes have been a potential danger for humans for thousands of years, and encountering a snake could mean getting bitten and potentially dying from venom. Therefore, it is reasonable that humans have evolved a fear of snakes as a survival mechanism.
When a child encounters a snake for the first time, her fear response might be triggered by innate, hard-wired mechanisms in the brain that have been passed down through generations. This fear response, often referred to as "preparedness," is thought to have evolved because it helped our ancestors survive in the wild. It is a way of protecting the child from potential harm.
In summary, a child might be afraid of snakes the first time she encounters one because of an innate fear response that has evolved through natural selection as a survival mechanism.
how many wisdom teeth does the average adult have?
The average adult has four wisdom teeth.
What are wisdom teeth?Wisdom teeth аre the molаrs occurring аt the posterior end of the dentition. When wisdom teeth erupt they mаy аffect other teeth becаuse of lаck of spаce to grow. Tooth extrаction is sometimes required to prevent tooth dаmаge аnd infection.
А wisdom tooth is the tooth right аt the bаck of the mouth. The most common аge to get wisdom teeth is between аge 17 аnd аge 19. It is however not unusuаl to hаve wisdom teeth erupt аnytime from аge 17-25. The аverаge аdult hаs four wisdom teeth, on in eаch corner of the mouth. Some people however cаn hаve fewer, аnd some people аre born with none.
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can someone help me please and i will give them Brainliest
T-T
Answer:
T = 38%
C = 12%
G = 12%
Explanation:
Adenine and thymine pair together
Since adenine is 38%, thymine(T) is also 38%
Cytosine and Guanine pair together
there are total are 100%
so, 100-38-38= 24
24/2= 12
so, Cytosine(C) and guanine(G) are 12% each
In an experiment to investigate an aspect of digestion,two test tubes A and B were set up.the test tubes were left in the bath for 30minutes.the content of each test tube was then tested for starch using iodine solution.what was the aim of this experiment?what results were expected in test tube A and B?account for the results in the question before in test tube A and B.
The student looked into how temperature affected the activity of the enzyme amylase.
Blood in the blood arteries surrounding the intestine is represented by the water in the boiling tube outside the model gut.
What proof demonstrates the complete breakdown of the starch?When starch is present, iodine solution takes on a blue/black hue; however, when all of the starch is broken down, no longer does this happen.
To allow the reaction to take place while waiting for the enzyme to react with the starch, the test tubes should be kept undisturbed.
The amylase will break down starch extremely fast at the ideal temperature. Due to its lower kinetic energy, the amylase will break down starch gradually at low temperatures.
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If the female marked by the arrow (individual 18) has a child with a male carrier, what is the probability their child will have attached earlobes?
Answer:
50%
Explanation:
Woman = aa
Man = Aa
Child Possibilities
Aa, Aa, aa, aa
Free
Attatched
What are some examples of propaganda in Animal Farm Chapter 4?
In chapter 4 of Animal Farm, the pigs use propaganda to control and manipulate the other animals. This propaganda controls the animals' thoughts, actions, and emotions, making them more subservient to the pigs' rule.
One example of propaganda is the use of slogans such as "Four legs good, two legs bad" and "Animal are comrades" which are repeated throughout the chapter. These slogans are used to simplify and unify the animal's thinking, making them easier to control.
Another example of propaganda is the use of rewriting history, in which the pigs alter the historical records of the farm to make it appear that the pigs were responsible for the farm's successes and the other animals were not. This is used to justify their increasing power and control over the farm.
The pigs use the idea of "Animal of England" as a propaganda tool to instill nationalism feelings and make the animals believe that their cause is bigger than them, and that they are part of a great movement, making them more willing to work harder.
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Most damage during hurricanes is due to:
Question 3 options:
High winds
Tornadoes created by the hurricane
Storm surge flooding
High pressure breaking windows
Answer:
Storm surge flooding. This can have the most impact on peoples homes and the community.
Explanation:
Hope it helps! =D
Bacteria are tremendously successful unicellular organisms, yet all large organisms are multicellular. Unicellular organisms cannot grow very large because the -.
Bacteria are unicellular organisms and multicellular. Unicellular organisms cannot grow very large because they only have a single cell.
What are bacteria?Bacteria are a group of single-celled microorganisms classified at the domain level. Together with the Archaea domain, bacteria are classified as prokaryotes. Bacterial cells have a specific shape, such as a ball, rod, or spiral, which is usually a few micrometers in size.
There are 2 sizes of bacteria, namely unicellular and multicellular organisms. Unicellular is an organism consisting of only one cell while multicellular is an organism consisting of many cells. Protists are also included in living things with eukaryotic cells which are meant to have a nuclear membrane.
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Can someone please give me the answer to this ?
Answer: b
Explanation: its easy
Which of the following pedigrees most accurately represents a family with a history of Tay-Sachs disease
One that affects the entire second generation. An autosomal recessive allele of the HEXA gene causes Tay-Sachs disease, a rare hereditary condition.
Tay-Sachs disease: which gene is impacted?A genetic ailment called Tay-Sachs is handed down from parents to their offspring. It happens when a child receives a defective (mutated) copy of the HEXA gene from both parents. A lack of the enzyme beta-hexosaminidase A results from the genetic mutation that causes Tay-Sachs disease.
What Tay-Sachs disease variant is most prevalent?The brain and spinal cord's nerve cells are destroyed as a result of the genetic condition Tay-Sachs disease. Tay-Sachs disease in infants is the most prevalent kind.
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The complete question is -
Which pedigrees most closely resemble a family with a Tay-Sachs disease history?
SCIENTIFIC QUESTION:
does prairie rainfall affect the health of the following years calves
Rainfall can affect the health of calves in a number of ways, depending on the quantity and timing of the precipitation.
How does adequate rainfall help in the cattle?Adequate rainfall can provide the necessary moisture for the growth of vegetation, which in turn can provide the necessary nutrients for the cows to produce milk, which is important for the growth of their calves. Also, good rain helps to maintain the pasture's quality, which will help the cattle to have enough forage to eat during the grazing season.
How does prairie rainfall affect the health of calves?Heavy rainfall or rainfall at the wrong time of the year can lead to flooding or over saturation of pastures, which can lead to reduced forage quality and availability, making it harder for the cows to find enough food to support the growth of their calves. Additionally, heavy rain can lead to soil erosion and loss of topsoil, which can further reduce the quality of the pasture.
In addition, too much water in the pasture can lead to mud and standing water, which can cause problems for the cattle such as increased risk of infection and disease.
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What are the 4 steps of the phosphorus cycle?
Answer:
The four steps are
Explanation:
Steps of Phosphorus Cycle
Weathering.
Absorption by Plants.
Absorption by Animals.
Return to the Environment through Decomposition.
What is meant when we say salmon are considered anadromous
Anadromous fish are species of fish that migrate from the ocean to freshwater streams and rivers to spawn. Salmon are an example of an anadromous species, as they migrate from the ocean to freshwater streams to lay their eggs.
Sensory input is delivered to the brain by:
A. afferent neurons
B. motor neurons
C. interneurons
D. efferent neurons
Sensory input is delivered to the brain by afferent neurons.
In general , Afferent or sensory neurons are responsible for collecting stimuli that are deceived by receptors throughout the body . Organs includes skin, eyes, ears, nose, tongue they are also responsible for receiving pain signals from the internal organs. These information are then transferred to the central nervous system, including brain and spinal cord.
Hence , we can say that Afferent neurons are sensory neurons, and they are nerve fibers responsible for bringing sensory information from the different sense organs towards the brain. These information can be in the form of special senses, such as vision, hearing, smell, or taste, as well as the sense of touch, pain, and temperature.
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