How does butter in your food gets digested and absorbed in the body?

Most of the nutrients from food are digested and absorved in the small intestine why?

How does the dividing embryo get implanted?

How are the minerals absorbed by the plants?

How does the peacock feathers get colouration ?

How does developing embryo gets its nouroshment inside the mother 's body ?

How do you test for glucose in food ?

Assertion :Digested and semi-digested food is absorbed by body surface in tapeworms. Reason: Digestive organs are absent in tapeworms.

How does vitamin B_(12) get absorbed ?