The cephalic stage of digestion a. begins when food enters the stomach. b. is regulated primarily by cck. c. prepares the mouth and stomach for the arrival of food. d. a and b are correct. e. a, b and c are correct.

I’m doing some practice exam questions for biology, and i’m not sure how to do these 3 parts to the question.

The table below shows the number of foot bones in some horse fossils.horse fossil recordhorse fossil number of foot bonesp 19q 17r 24s 13ancient horses had more bones in their foot then present-day horses. the present-day horse has 11 foot bones. what is the correct order of evolution of the horse starting from the youngest fossil? a. q p r s b. s r p q c. s q p r d. r p q s

Cells destroy body cells infected by a virus or bacteria. killer t t memory t none of the above