Select all the ratios that are equivalent to each other.
A4:7
B. 8:15
C 16:28
D. 2:3
E 20:35

Dwarf galaxies are select one: a. relatively rare. b. not very bright c. mostly spiral shaped. d. none of these.

Which of the following are false concerning microbes? a. microbes generate oxygen through photosynthesis.b. the primary role of microbes on the planet involves causing disease in animals and humans.c. microbes produce vitamins in the intestines.d. microbes play a role in breaking down waste and decomposing dead organisms.

How does natural selection change thephenotypes within a population over time?