Where does food enter the blood vessels? stomach

villi

liver

pancreas

Explanation:

it's a process so it's first goes in the mouth then it goes through the esophagus, stomach, small and large intestine. In the GI tract, nutrients and water from foods are absorbed to help keep your body healthy.

The muscles of the small intestine mix food with digestive juices from the pancreas, liver, and intestine, and push the mixture forward for further digestion. The walls of the small intestine absorb water and the digested nutrients into your bloodstream. I hope this helps

•there must be variation for the particular trait within a population.

•the variation must be inheritable (that is, it must be capable of being passed on from the parents to their offspring).

•individuals with one version of the trait must produce more offspring than those with a different version of the trait.good

explanation:

if the type of the food available changes, then the frequency of beak types will change, because birds with beaks more suited to the available food will be more successful over time.