C. Allantois stores waste products produced by an embryo
hope this helps you out good luck.!!!!
One reason is for safety! in case you get stranded in a body of water you can keep yourself afloat
Answer:
I think that the answer would be D
DNA structure. DNA is made up of molecules called nucleotides. Each nucleotide contains a phosphate group, a sugar group and a nitrogen base. The four types of nitrogen bases are adenine (A), thymine (T), guanine (G) and cytosine (C).
Answer: c. molecular structure of DNA
