All of the following are true of the intestinal phase of gastric digestion, except that it a. involves both neural and endocrine reflexes. b. ends when fat enters the small intestine. c. helps to ensure that the functions of the small intestine proceed with relative efficiency. d. functions to control the rate of gastric emptying. e. begins when chyme enters the small intestine.

What type of appendages do sponges cnidarians roundworms annelids mollusks arthropods echinoderms and vertebrate have? jointed, not jointed, absent  

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.

After a group of researchers conducts a new experiment that has never been conducted before, what is the best way for other scientists to make sure that the data is real