To avoid being digested by their host, endoparasites have a thick protective covering called the

a. cell wall.

c. protoplasm.

b. cilia.

d. tegument.

Scientists believe that ancient ancestors of all animals were. A. Single-celled prokaryotes that reproduced asexually B. Single-celled eukaryotes that sometimes grew in colonies C. Multi-cellular organisms that were probably autotrophic. D.

Which of the following is an example of homologous structures? A. Whale hip bones. B. Embryos of fish and birds both make gill slits. C. Mice and chicken differ by only 25 amino acids when they make hemoglobin protein. D.

Drag each label into the appropriate position to identify whether the characteristic is indicative of arteries or veins. mcrow hill

Hemophilia is a sex-linked disorder in which a person's blood clots very slowly or not at all. Why are males more likely to inherit hemophilia than females?

Organisms from two separate species can look anatomically similar. true or false? true false

What do all cells in a multicellular organism have in common

One of your friends has decided to make it his life's work to characterize all functional proteins, as he is convinced that all possible amino acid combinations can result in a protein. is it possible to confirm his hypothesis in this way

A membrane-bound compartment inside chloroplasts and cyanobacteria that is the site of the light-dependent reactions of photosynthesis is

Which food supplies only discretionary kcalories? a. bagel b. peanut butter c. grape jelly d. raisins?

Members of which two domains of life are composed of one or more prokaryotic cells?