Consider the following scenario:
A drought hits the habitat of a semi-aquatic bird population. All ponds dry up, and fish populations decline. There are two groups of birds in the population that differ in leg length and diet. Long-legged birds eat fish, while short-legged birds eat insects. The drought has little effect on insect populations.
What is the main selective pressure in this scenario?
can i get the answers for this test please?
1. fish population 2.Organisms with variations that give an advantage are more likely to survive. 3.advantageous trait 4.The dark-colored moths became more common. 5 The proportion of short-tailed squirrels may have decreased due to an increase in trees. 6 inbreeding in zoos. 7 They are less likely to survive environmental changes because of the bottleneck event. 8 evidence. 9 It shifts either to the right or to the left. 10 Disruptive; males of intermediate coloring make up a small part of the population. 11 making crops that are resistant to pesticides and insects.
1. fish population
2. Organisms with variations that give an advantage are more likely to survive.
3. advantageous trait
4. The dark-colored moths became more common.
5. The proportion of short-tailed squirrels may have decreased due to an increase in trees.
6. multiple bottleneck events
7. They are less likely to survive environmental changes because of the bottleneck event.
8. evidence.
9. It shifts either to the right or to the left.
10. Disruptive; males of intermediate coloring make up a small part of the population.
11. making crops that are resistant to pesticides and insects
1. A drought hits the habitat of a semi-aquatic bird population. All ponds dry up, and fish populations decline. There are two groups of birds in the population that differ in leg length and diet. Long-legged birds eat fish, while short-legged birds eat insects. The drought has little effect on insect populations.
What is the main selective pressure in this scenario?
A: Fish population
2. Which statement is accurate about variations?
C: Organisms with variations that give an advantage are more likely to survive
3. In a muddy lake environment, some fish have brown scales. Most fish, however, have silver scales. Predators have a harder time seeing the fish with brown scales.
Which term best describes the brown scales?
A: Advantageous trait
4. How did the Industrial Revolution impact the population of peppered moths in Britain?
D: The dark-colored moths became more common
5. There are two varieties in a population of squirrels: short tails and long tails. Long-tailed squirrels are better at jumping and balancing in trees. Scientists observe that over the span of 100 years, the proportion of the population with long tails increases from 10% to 60%. Which statement is most likely?
B: The proportion of short-tailed squirrels may have decreased due to an increase in trees
6. The proportion of short-tailed squirrels may have decreased due to an increase in trees.
A: multiple bottleneck events
7. After a bottleneck event, the population of rabbits in an area has significantly decreased. A decade later, the population of the rabbits recovers to its original numbers. Which statement is correct about the rabbits?
B: They are less likely to survive environmental changes because of the bottleneck event
8. Facts or data are types of ___
A: Evidence
9. What change is observed in a distribution curve for a trait affected by directional selection?
C: It shifts either to the right or to the left
10. In a population of birds, brightly colored males and very dull males survive best. Which type of selection is this, and what is most likely true about the proportion of males of intermediate coloring?
A: Disruptive; males of intermediate coloring make up a small part of the population
11. Which action an example of genetic modification (creating GMOs)?
C: Which action an example of genetic modification (creating GMOs)?
12. Imagine you are a scientist observing rats in the wild. As the rats reproduce, rats born with white fur slowly begin to outnumber rats with black fur. In three to five sentences, provide two or more different explanations of why the rats with white fur might be outnumbering the rats with black fur.
***Answer: One explanation is that white fur is a dominant trait, while black fur is a recessive trait. As the rats breed, the recessive trait slowly dies out. Another explanation is that white fur is better camouflage from predators for their environment. Through survival of the fittest, the rats with white fur begin to outnumber the rats with black fur.
13. Pretend you are a scientist observing three different varieties of a single bird species that are part of the same population. In three to five sentences, describe what genetic variations exist in your population. Then, using reasoning skills and mock evidence from your observations, describe the impact these traits have on the birds’ relationships with their environment and predators.
***Answer: The genetic variation that occurs in the three different species of birds is the difference between their beak size, color of their feathers, and body size. The difference in beak size occurs due to the differences in their diet. Some birds in the population feed on small prey, whereas others have large beaks due to a preference for larger food. Some birds have color that resemble their surroundings. This helps them hide from predators. And lastly, some bird species have large bodies due to the availability of more food or due to genetics.
14. Compare and contrast the advantages and disadvantages of selective breeding versus genetic modification. Why might a person choose to use selective breeding over genetic modification? Why might a person choose to create a GMO over a selectively bred organism? Use three to five sentences to formulate your argument.
***Answer: With anything, there are pros and cons, but I'll be focusing on the pros.
Some of the pros for genetically modified organisms include, they are in theory "perfect", they most likely wont have any infections or diseases, and if it's genetically modified, they should be almost exactly the way population wants it.
And now onto the pros of breeding. They can be more organic and healthy, more authentic, and the general population will feel safer when eating organic foods.
thats all wrong bro don trust him its all wrong my dad finna beat me now THANKS ALOT :(
she made me get 6 wrong on a damn unit test AHHHHHHHHHHHHHHHH
you cant say the letters you need to say the exact answer pls help though
Their you go guys that is 100% right
my grade overall went down to a 87