Question 1

Which two factors could lead to the evolution of a species over time?

Accepted Answer

changes in the genes of sex cells and survival of the fittest

Answer

overproduction of offspring and no variation

Answer

struggle for survival and fossilization

Answer

changes in the genes of body cells and extinction

Question 2

Scientists at Penn State have sequenced the DNA of the extinct woolly mammoth. The data suggested that the woolly mammoth was more closely related to present-day elephants than previously believed.

Which statement could account for the similarities between the woolly mammoth and present-day elephants?

Accepted Answer

Present-day species developed from earlier, different species.

Answer

Both animals have identical genetic information.

Answer

Common gene mutations were caused by agents such as industrial chemicals and radiation.

Answer

Selective breeding results in offspring better able to survive.

Question 3

In addition to the appearance of the antifreeze gene, icefi sh have also been found to have DNA sequences similar to the DNA sequences in hemoglobin genes of other fi sh species. However, these DNA sequences are not complete and therefore not functional in icefi sh. This evidence makes it likely that

Accepted Answer

icefish ancestors had hemoglobin

Answer

icefish will soon produce offspring with hemoglobin

Answer

hemoglobin is a molecule made by some fish that do not have genes for it

Answer

soon all fish will stop producing hemoglobin

Question 4

Genetic recombination, production of more offspring than can survive, and struggling with the challenges of the environment are all concepts associated with

Accepted Answer

natural selection

Answer

selective breeding

Answer

genetic engineering

Answer

mitotic division

Question 5

An example of a population in which evolution could take place in a relatively short period of time could be

Accepted Answer

pathogenic bacteria exposed to antibiotics

Answer

oak trees in a stable ecosystem

Answer

elephants living in a wildlife preserve

Answer

algae grown under constant conditions

Question 6

Butterflies exposed to radiation leaking from a damaged nuclear power plant in Japan have been observed to have malformed legs, antennae, and wings. For future butterfly generations to have these similar structural abnormalities, gene mutations must be present in the affected butterflies'

Accepted Answer

sex cells

Answer

body cells

Answer

wing cells

Answer

antenna cells

Question 7

The process of sexual reproduction is an important part of the process of evolution. One reason for this is that meiosis and fertilization directly produce many new

Accepted Answer

variations

Answer

species

Answer

antigens

Answer

pathogens

Question 8

This behavior continues to be present in the rabbitfish population because

Accepted Answer

this behavior increases their chance of survival

Answer

both fish could not fit into the small spaces in the coral

Answer

the fish species needed to become alert to survive

Answer

this behavior was learned by observing other fish species

Related quizzes

Related quizzes