Which of the following is true of clydesdale and thoroughbred horses?
a. they are different species and have different traits.
b. they are the same species and have the same traits.
c. they are the same species and have different traits.
d. they are different species and have the same traits.

Biomass can be used to generate electricity. biomass relies heavily on agricultural crops. plants release carbon dioxide and water in combustion. plants use photosynthesis to originally generate the energy that is needed. the chemical energy of these plants all started with what energy source?

What molecules does hemoglobin decay into over time

Which of the following statements is true about the relationship between genetic variation and natural selection? a. genetic variation must be present in a population before natural selection can act on it. b. genetic variation arises in a population as a result of natural selection. c. natural selection can act on a population whether there is genetic variation within the population or not. d. after natural selection acts on a population, the amount of genetic variation in the population always increases.