When apples were introduced to north america some individuals of a species of maggots that fed in hawthorns began to grow in apples. over time a species that fed exclusively on apples emerged and became separate from the species that fed on hawthorns. this type of speciation is called
a. sympatric speciation
b. allopatric speciation
c. parapetric speciation
d. peripatric speciation

The seed coat's most important function is to provide a) a nonstressful environment for the megasporangium. b) the means for dispersal. c) dormancy. d) a nutrient supply for the embryo. e) desiccation resistance.

If animal agriculture was eliminated, how much grain would become available for human consumption?

What is a difference between systemic and pulmonary circulation? a. systemic circulation carries oxygenated blood to the lungs and pulmonary circulation carries deoxygenated blood to the body. b. systemic circulation carries deoxygenated blood to the lungs and pulmonary circulation carries oxygenated blood to the body. c. systemic circulation carries deoxygenated blood to the body and pulmonary circulation carries oxygenated blood to the lungs. d. systemic circulation carries oxygenated blood to the body and pulmonary circulation carries deoxygenated blood to the lungs.