Which factor is most important for classifying two species into the same group? A. They have a common ancestor.
B. They have similar common names.
C. They live in the same type of environment.
D. They look very similar to each other.

Which best describes how the common cold spreads in the human body? a bacteria burst out of normal cells killing them b viruses replicate inside respiratory cells c bacteria inject dna into normal cells d viruses insert dna into bacteria

Someone me with this: a mineral' is determined by its actomic structure.

Which of the following does not make up ground substance of connective tissue? hyaluronic acid elastic fibers glycosaminoglycan proteoglycan