Matter is needed to transfer thermal energy by
a. conduction.
b. convection.
c. radiation.
d. both a and b

What is the first step in a life cycle of a plant reproduce sexually

Astructure that is found in a plant cell and not in an animal cell is a ? central vacuole mitochondrion nucleus ribosome

Which statement describes how favorable traits in a population relate to natural selection? they are the only traits that ever exist in the population. they build in the population over time. they are rarely passed on to offspring. they are found only in a few individuals within the population.