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

List three types of evidence for seafloor spreading

Which of the following is a description of chyme? A. A watery mixture of partially digested food released by the stomach into the intestinesB. The semisolid mass of undigested food that is swallowedC.

Why can't energy be recycled?

The controlled release of nuclear energy in a reactor is accomplished by

What has to happen to nitrogen gas in order for it to be used by organisms?

In module 1 you identify which species of lizards were most similar to one another based on

Are surface currents that flow towards the poles generally warm or cold?

Which is the correct order of the processes responsible for the formation of sedimentary rocks? erosion, deposition, compaction weathering, cementation, deposition cementation, compaction, erosion?

Urine exits through what external opening on both male and female rats

What information can be inferred about genes that are located on different chromosomes? what information can be inferred about genes that are located on different chromosomes? these genes are always inherited together.