What factors cause the correlation between the reduction in skin pigmentation in humans and migration of human populations away from the equator?(1 point)

Question

Responses

The exposure of human populations to new diseases common to the polar regions interfered with melanin production causing lighter skin.
The exposure of human populations to new diseases common to the polar regions interfered with melanin production causing lighter skin.

The exposure of human populations to less UV light required a reduction in melanin to produce more vitamin D for healthier bones.
The exposure of human populations to less UV light required a reduction in melanin to produce more vitamin D for healthier bones.

The exposure of human populations to predators only common to the polar regions caused them to adapt by camouflaging better with the environment.
The exposure of human populations to predators only common to the polar regions caused them to adapt by camouflaging better with the environment.

The exposure of human populations to new sources of food common to the polar regions cause changes in physiology that resulted in the production of less melanin.
The exposure of human populations to new sources of food common to the polar regions cause changes in physiology that resulted in the production of less melanin.
Question 8
Which correctly identifies a positive correlation regarding the increase in black peppered moth populations in England during the late 1800s?(1 point)
Responses

the correlation between black moth populations and predation of black moths
the correlation between black moth populations and predation of black moths

the correlation between air pollution and moth predation
the correlation between air pollution and moth predation

the correlation between air pollution and white moth populations
the correlation between air pollution and white moth populations

the correlation between air pollution and white moth predation
the correlation between air pollution and white moth predation
Question 9
Which statement is accurate about natural selection?(2 points)
Responses

It is a biological process that allows a population to have a competitive advantage in many environments.
It is a biological process that allows a population to have a competitive advantage in many environments.

It is a biological process that causes certain traits to be expressed less with each subsequent generation.
It is a biological process that causes certain traits to be expressed less with each subsequent generation.

It is a biological process that prevent species from adapting to significant changes in their environments.
It is a biological process that prevent species from adapting to significant changes in their environments.

It is a biological process that leads a population to have a widespread expression of an advantageous trait.
It is a biological process that leads a population to have a widespread expression of an advantageous trait.
Question 10
Which of the following scenarios would reduce the number of inheritable traits in a population, causing the individuals in that population to remain very similar to one another?(2 points)
Responses

A forest that is being converted into farmland.
A forest that is being converted into farmland.

A lake that is drying up due to shifts in water flow.
A lake that is drying up due to shifts in water flow.

A desert that has existed for millennia.
A desert that has existed for millennia.

A swamp that is being drained to build houses.
A swamp that is being drained to build houses.
Question 11
Suppose the mutation for the sickle cell disease gene first appeared in a region without malaria. The first carrier of the gene would have __.(2 points)
Responses

had the same likelihood to survive and reproduce as his peers.
had the same likelihood to survive and reproduce as his peers.

been more likely to survive and reproduce than his peers.
been more likely to survive and reproduce than his peers.

been less likely to survive and reproduce than his peers.
been less likely to survive and reproduce than his peers.

died from sickle cell before reproducing.
died from sickle cell before reproducing.
Question 12
What evidence is there that the 15 species of finches on the Galapagos islands all evolved from one common ancestor?(2 points)
Responses

These 15 species of finches are found nowhere else in the world, and the islands are located close enough to the mainland for the birds to migrate.
These 15 species of finches are found nowhere else in the world, and the islands are located close enough to the mainland for the birds to migrate.

Scientists have been studying them since Darwin in 1835 and have watched them evolve.
Scientists have been studying them since Darwin in 1835 and have watched them evolve.

Observation of all 15 species shows that they look incredibly similar, with minor changes to beak size and shape.
Observation of all 15 species shows that they look incredibly similar, with minor changes to beak size and shape.

DNA analysis shows that their DNA is almost identical with only minor changes.
DNA analysis shows that their DNA is almost identical with only minor changes.
Question 13
What is the difference between genetic drift and natural selection?(2 points)
Responses

Genetic drift is the frequency of genes in a population; natural selection is the frequency of adaptations in a population.
Genetic drift is the frequency of genes in a population; natural selection is the frequency of adaptations in a population.

Genetic drift is the random increase or decrease of certain genes in a population; natural selection is not random.
Genetic drift is the random increase or decrease of certain genes in a population; natural selection is not random.

Genetic drift is the selection of random traits in a population; natural selection is the selection of specific traits.
Genetic drift is the selection of random traits in a population; natural selection is the selection of specific traits.

Genetic drift is the change in a population over time; natural selection is the evolution of a population over time.
Genetic drift is the change in a population over time; natural selection is the evolution of a population over time.
Question 14
What is the definition of adaptive radiation?(3 points)
Responses

when multiple populations of a species in the same location adapt in a different manner.
when multiple populations of a species in the same location adapt in a different manner.

when an ancestor species rapidly splits into different descendants due to environmental pressures.
when an ancestor species rapidly splits into different descendants due to environmental pressures.

when multiple populations of a species in different locations adapt in the same manner.
when multiple populations of a species in different locations adapt in the same manner.

when an ancestor species slowly splits into different organisms due to environmental pressures.
when an ancestor species slowly splits into different organisms due to environmental pressures.
Question 15
What may cause two different populations to develop different traits?(2 points)
Responses

migration
migration

interbreeding
interbreeding

passage of time
passage of time

reproduction
reproduction
Question 16
Bacteria are able to evolve easily, which is why antibiotic resistance is on the rise. Several factors contribute to the evolution of bacteria, except:(3 points)
Responses

their DNA mutates when they divide, making new potential adaptations.
their DNA mutates when they divide, making new potential adaptations.

non-resistant bacteria die, and resistant bacteria survive.
non-resistant bacteria die, and resistant bacteria survive.

they have the shortest genetic material, which makes them the fastest to replicate.
they have the shortest genetic material, which makes them the fastest to replicate.

bacteria grow and multiply quickly, so they evolve rapidly.

Answer 1

Here are the best responses for each question you've presented:

Question 7 Which factor causes the correlation between the reduction in skin pigmentation in humans and migration of human populations away from the equator?

• The exposure of human populations to less UV light required a reduction in melanin to produce more vitamin D for healthier bones.

Question 8 Which correctly identifies a positive correlation regarding the increase in black peppered moth populations in England during the late 1800s?

• The correlation between air pollution and white moth populations.

Question 9 Which statement is accurate about natural selection?

• It is a biological process that leads a population to have a widespread expression of an advantageous trait.

Question 10 Which scenario would reduce the number of inheritable traits in a population, causing the individuals in that population to remain very similar to one another?

• A swamp that is being drained to build houses.

Question 11 Suppose the mutation for the sickle cell disease gene first appeared in a region without malaria. The first carrier of the gene would have:

• Had the same likelihood to survive and reproduce as his peers.

Question 12 What evidence is there that the 15 species of finches on the Galapagos islands all evolved from one common ancestor?

• Observation of all 15 species shows that they look incredibly similar, with minor changes to beak size and shape.

Question 13 What is the difference between genetic drift and natural selection?

• Genetic drift is the random increase or decrease of certain genes in a population; natural selection is not random.

Question 14 What is the definition of adaptive radiation?

• When an ancestor species rapidly splits into different descendants due to environmental pressures.

Question 15 What may cause two different populations to develop different traits?

• Passage of time.

Question 16 Several factors contribute to the evolution of bacteria, except:

• They have the shortest genetic material, which makes them the fastest to replicate.

If you need any additional clarification or help with other questions, feel free to ask!