How are Earth and Saturn similar? They both have the same mass.
They both would float in water because of low density.
They both have the same number of satellites.
They both have seasons caused by a tilted axis.

Which system revise and send electrical signals throughout the body

Any sound above what db can cause hearing loss in human beings

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.