9. What is the first event that occurs when a virus infects a host cell?
A The virus destroys all of the host cell's DNA.
B The virus attaches to the host cell's membrane.
C The virus transports its genes across the host cell's membrane.
OD The virus injects its genes into the host cell's DNA.

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Elephants in the savanna regions of africa dig holes in dried up river beds to reach water lying just below the surface. these holes provide drinking water for other animals as well. so, without the elephants, many animals might otherwise die from lack of water during the dry season. the location in which the elephants live is an example of a/n and the role they play in creating water holes is an example of a a) ecosystem; habitat b) community; niche c) habitat; niche d) niche; habitat

What is the most appropriate method of gaining weight (muscle mass)

How do you know that the plant cells in these two images have different jobs, or functions? a. because all plant cells serve different functions b. because they are two different colors c. because their dna are different d. because their structures are different