Question

A) As a framework to examine evolutionary change, population genetics works best when:

a.

the entire history of life is examined

b.

evolutionary conflict occurs between levels of selection

c.

selection acts at different levels within the same organism

d.

individuals are units of selection and carry heritable information

e.

all of the above

B) Which of the following were likely characteristic of the early Earth?

a.

CO2greenhouse effect

b.

ultraviolet radiation

c.

huge tides

d.

a vast ocean with a few islands

e.

all of the above

Answer 1

A) As a framework to examine evolutionary change, population genetics works best when:

Ans : Option d

Individuals are units of selection and carry heritable information

Reason : Population genetics is the science of genetic variation within populations of organisms. It is the study of genetic variation within and among populations and the evolutionary factors that explain this variation. It provides the deepest and clearest understanding of how evolutionary change occurs. Population genetics describes natural selection by defining fitness as probability of survival and reproduction in a particular environment.

B) Which of the following were likely characteristic of the early Earth?

Ans : Option a

CO2 greenhouse effect

Reason : The early earth atmosphere is too hot and there is only presence of gases like CO2, methane, watervapour etc. These gases provide warming to the earth's surface which is known as Green house effect. These gases are known as greenhouse gases. This effect, together with the chemical processes, would have set the conditions for life to evolve on our planet.