A single chromosome has Multiple Choice multiple genes each with a single allele. multiple genes each with multiple alleles. a single gene with a single allele. a single gene with multiple alleles. No answer is correct.

i believe it would be c: tons.

not necessarily. higher fitness requires the organism to be reproductive successful. for example, an organism at age 10 with 15 offspring is much more fit than an organism at age 15 with only 5 offspring.

the answer is true when observing or determining population size, a direct observation is use, in which each organism is counted in a population or in an area. one benefit of this measure is that you get the exact population count but it will take a long time to  determine  the  size  of a  population.