The tissue lining the air passages in the human body

All individuals have two alleles for a given trait. according to mendel's these alleles are passed down one each from both mother and father.

Which statement describes compounds a. compounds are made of one type of atom. b. compounds cannot be represented by models. c. compounds are represented by chemical formulas. d. compounds cannot be broken down into simpler forms.

What organ is the first to receive nutrients that have been absorbed from the digestive tract?