Which best describes a pilus?

A. A tube that extends from a bacterium

B. A piece of DNA transferred by a virus

C. A virus that causes a common cold

D. A protective shell around a bacterium

Skulls can reveal many things about our hominid ancestors. What aspect of hominids is not related to skull anatomy? A. What they ate. B. Their hair and skin color. C. Whether they stood upright. D. The shape and size of their brain.

Where do new cells come from? other cells nucleus macrophages Golgi body

Which theory suggests that the moon and the earth formed at the same time from dust from the solar nebula that formed the Sun?

After the DNA is unwound, what protein keeps the strands from reannealing? a. DNA primase b. Sliding clamp c. Helicase d. SSB protein

What is a concentration gradient? what does it mean if a molecule diffuses down it's concentration gradient?

Charlene just said hi what do you think she is thinking

C ^H! @O ^ + O @S 6 CO @ + 6 H @O DG = - 686 kcal/mol This reaction represents cellular respiration. What happens to the energy released from glucose during this reaction?

Which statement about the Internet is correct? Select the best answer from the choices provided. A.) It is completely banned by China and other repressive regimes. B.) It can bring greater political freedom to oppressive regimes. C.

Write a one - to two-paragraph summary describing cloning. (cloning of animals)

There's a good evidence that a meteor hit earth about 65 million years ago which of the following events that the scientist think were triggered by the impact could have caused the Simultaneous global extinction of multiple species including all of