Mastication is a process that facilitates A. propulsion of materials through the intestine, and it involves simultaneous secretion of enzymes. B. mixing of food within the stomach, and it occurs with simultaneous hormone secretion there. C. swallowing of food, and it increases the surface area of the food for exposure to enzymes. D. absorption of nutrients into the bloodstream, and it involves carrier proteins in the epithelium.

Joe is breeding cockroaches in his dorm room. he finds that the average wing length in his population of cockroaches is 4 cm. he chooses the six cockroaches that have the largest wings; the average wing length among these selected cockroaches is 10 cm. joe interbreeds these selected cockroaches. from earlier studies, he knows that the narrow-sense heritability for wing length in his population of cockroaches is 0.6. a. calculate the selection differential and expected response to selection for wing length in these cockroaches. b. what should be the average wing length of the progeny of the selected cockroaches?

As a result of wildfires, in grasslands. a) tree growth increases b) grass growth increases c) soil quality decreases d) invertebrate variety decreases

Jasmine, at 33 months of age, is able to engage in some self-care behaviors but still has trouble with tasks such as putting on socks. a few months later, she accomplishes this same task relatively easily. the change in abilities is most likely due to