The different forms of a gene are called
a. alleles
b. phenotypes
c. chromosomes
d. polygenics

Groups of organisms with low biotic potential, such as gray whales, that produce at most one offspring every other year a) are r-selected b) are k-selected c) are not subject to density-dependent limiting factors d) show the initial stages of the extinction process e) have escaped from the processes of natural selection and adaptation

The theories on the expansion of galaxies maybe re-examined to strengthen science should not be tested to strengthen science will weaken scientific knowledge if they change will become laws if they don't change

Most animal cells membranes have proteins that pump ions out of the cell and potassium ions into the cell