If changes occur in a DNA sequence, which other parameter must change?

phenotype ratio

mutation rate

variation amount

allele frequency

In Unit 2 you learned that ocean temps and levels are rising due to the Greenhouse Effect. Do you see the trend for northern migration to continue if ocean temps continue to rise? What could happen to sea turtle nests if ocean levels rise?

The importance of carbon what would most likely happen to the carbon cycle if there were no more plants on earth?

Fish species A has a gestation time of three months and lays 300 eggs per clutch. Fish species B has a gestation time of 5 months and lays 200 eggs per clutch. Which fish species would make a better model organism, and why?

There are amphibians that are even larger than bullfrogs. Which of the following could explain how such a large amphibium could obtain a sufficient rate of diffusion of respiratory gases? a. living in an environment of lower oxygen concentrationb.

If blood has low viscosity, which result would be likely under normal conditions?

8. List at least 5 new discoveries about viruses.

The phospholipid molecule has two parts, the polar end and the bipolar end. True or False?

Giraffes use their extremely long necks to reach the lees high up on a case he had trees which other animals can not reach giving them a food source for which they have few competitors what can you conclude about natural selection from this

Which is a reason that many organisms that have existed on earth have left no fossils?

Are all organisms with similar physical characteristics related to one another? If not, why?