There are twenty standard amino acids that make up all proteins. what four elements are found in all amino acids?

Explain how the number of similarities between the embryos from early stage to late stage is used as evidence of a common ancestry

Everything that surrounds a particular organism

Which of the following correctly describes the appearance of muscle tissue found in the heart? (2 points) single-nucleus, non-striated, short cells single-nucleus, striated, branching cells multinucleated, non-striated, branching cells multinucleated, striated, long threadlike cells