What does the rock and fossil represents?

A. Index fossil

B. Geologic time

C. The age of reptiles

D. The age of mammals

In the ABO series of human blood types, people have only one kind of blood type, either A, B, AB, or O. This illustrates what kind of variation?

Suppose that, somehow, all plants disappeared from earth, what would happen to the oxygen in our atmosphere?

Which of the following had a monarchal form of government. A. Europe B. Japan C. China D. Southeast asia select all that apply.

What types of muscle tissue is there and what are their functions?

One out of 10,000 babies born in north america is affected by cystic fibrosis, a recessive condition. assuming that the north american human population is in hardy-weinberg equilibrium for this trait, what percentage of the population is

10) The modality of a stimulus can be determined within the central nervous system by A) population coding. B) adequate stimulus for the sensory receptor cell. C) lateral inhibition. D) frequency coding.

How old is bone in which the carbon 14 in it has undergone 3 half lives

Correct order of human development

How do the respiratory and circulatory systems work together to make gas exchange possible?

What is the difference between an ion and an atom?