Answer:
you haven't given choices but I know some they help in digestion
Mass extinction would be the answer
Haploid. A cell containing only one set of chromosomes (n).
Answer:Proteins are composed of amino acid molecules linked together by peptide bonds. C, H, N, S, and O are typical atoms that compose amino acids
Explanation: I hope this help mark me brainliest
D
This is because of greenhouse gases and polution.