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?
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?
(1 point)
Responses
insect population
insect population
fish population
fish population
leg length
leg length
drought
availability of food
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?
(1 point)
Responses
insect population
insect population
fish population
fish population
leg length
leg length
drought
availability of food
is not a option 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?
(1 point)
Responses
insect population
insect population
fish population
fish population
leg length
leg length
drought
Which statement is accurate about variations?(1 point)
Responses
In all cases, variations affect how likely it is that an organism reproduces.
In all cases, variations affect how likely it is that an organism reproduces.
Organisms with variations are less likely to pass these variations to their offspring.
Organisms with variations, , are less likely, , to pass these variations to their offspring.
Organisms with variations that give an advantage are more likely to survive.
Organisms with variations that give an advantage are more likely to survive.
In all cases, variations become more common in a population
Organisms with variations that give an advantage are more likely to survive.
Consider the following scenario:
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?
(1 point)
Responses
inactivated gene
inactivated gene
advantageous trait
advantageous trait
predominant phenotype
predominant phenotype
new mutation
advantageous trait
How did the Industrial Revolution impact the population of peppered moths in Britain? (1 point)
Responses
The dark-colored moths became more common.
The dark-colored moths became more common.
The light-colored moths became more common.
The light-colored moths became more common.
The Industrial Revolution caused the proportions of each color morph in the population to become equal.
The Industrial Revolution caused the proportions of each color morph in the population to become equal.
The Industrial Revolution caused the proportions of each color morph in the population to become unequal.
The dark-colored moths became more common.
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? (1 point)
Responses
The proportion of short-tailed squirrels may have decreased due to an increase in trees.
The proportion of short-tailed squirrels may have decreased due to an increase in trees.
The proportion of long-tailed squirrels may have increased due to a decrease in trees.
The proportion of long-tailed squirrels may have increased due to a decrease in trees.
The proportion of long-tailed squirrels may have increased due to increased food availability.
The proportion of long-tailed squirrels may have increased due to increased food availability.
The proportion of short-tailed squirrels may have decreased due to decreased food availability.
The proportion of long-tailed squirrels may have increased due to their better jumping and balancing abilities, which would give them a higher chance of survival and reproduction in the tree-dwelling environment.
The proportion of long-tailed squirrels may have increased due to their better jumping and balancing abilities, which would give them a higher chance of survival and reproduction in the tree-dwelling environment.
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? (1 point)
Responses
The proportion of short-tailed squirrels may have decreased due to an increase in trees.
The proportion of short-tailed squirrels may have decreased due to an increase in trees.
The proportion of long-tailed squirrels may have increased due to a decrease in trees.
The proportion of long-tailed squirrels may have increased due to a decrease in trees.
The proportion of long-tailed squirrels may have increased due to increased food availability.
The proportion of long-tailed squirrels may have increased due to increased food availability.
The proportion of short-tailed squirrels may have decreased due to decreased food availability.
The proportion of short-tailed squirrels may have decreased due to their poor jumping and balancing abilities, which would give them a lower chance of survival and reproduction in the tree-dwelling environment.
The proportion of short-tailed squirrels may have decreased due to their poor jumping and balancing abilities, which would give them a lower chance of survival and reproduction in the tree-dwelling and environment.
The proportion of long-tailed squirrels may have increased due to their better jumping and balancing abilities, which would give them a higher chance of survival and reproduction in the tree-dwelling environment. are not options
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? (1 point)
Responses
The proportion of short-tailed squirrels may have decreased due to an increase in trees.
The proportion of short-tailed squirrels may have decreased due to an increase in trees.
The proportion of long-tailed squirrels may have increased due to a decrease in trees.
The proportion of long-tailed squirrels may have increased due to a decrease in trees.
The proportion of long-tailed squirrels may have increased due to increased food availability.
The proportion of long-tailed squirrels may have increased due to increased food availability.
The proportion of short-tailed squirrels may have decreased due to decreased food availability.
The proportion of long-tailed squirrels may have increased due to their better jumping and balancing abilities, which would give them a higher chance of survival and reproduction in the tree-dwelling environment.
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Consider the following scenario:
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?
(1 point)
Responses
new mutation
new mutation
predominant phenotype
predominant phenotype
advantageous trait
advantageous trait
inactivated gene
inactivated gene
advantageous trait
Why is the cheetah gene pool small today? (1 point)
Responses
lack of advantageous traits
lack of advantageous traits
poor adaptability
poor adaptability
multiple bottleneck events
multiple bottleneck events
inbreeding in zoos
inbreeding in zoos
multiple bottleneck events
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? (1 point)
Responses
They are more likely to survive environmental changes because of the bottleneck event.
They are more likely to survive environmental changes because of the bottleneck event.
They are as likely to survive environmental changes because their population has recovered.
They are as likely to survive environmental changes because their population has recovered.
They are as likely to survive environmental changes because they survived the bottleneck event.
They are as likely to survive environmental changes because they survived the bottleneck event.
They are less likely to survive environmental changes because of the bottleneck event.
They are less likely to survive environmental changes because of the bottleneck event.
They are less likely to survive environmental changes because of the bottleneck event. During the bottleneck event, the genetic diversity of the population was likely reduced, therefore reducing the population's ability to adapt to environmental changes. Although the population has recovered to its original numbers, the lack of genetic diversity makes it less likely for the rabbits to withstand environmental changes than if they had not undergone a bottleneck event.
Facts or data are types of(1 point)
Responses
reasoning.
reasoning.
models.
models.
evidence.
evidence.
explanations.
evidence.
Which action an example of genetic modification (creating GMOs)?(1 point)
Responses
breeding dogs for specific traits like size, coat color, and temperament
breeding dogs for specific traits like size, coat color, and temperament
raising animals via animal husbandry for food purposes
raising animals via animal husbandry for food purposes
selecting fruit that is fleshy with small seeds and planting those the following season
selecting fruit that is fleshy with small seeds and planting those the following season
making crops that are resistant to pesticides and insects