A scientist uses materials in her lab to cut a DNA sample into fragments.

What process is the scientist using

A. Karyotyping

B. Polymerase chain reaction (PCR)

c. Use of restriction enzymes

D. Gel electrophoresis

How are the molecules of the plasma membrane arranged? in one layer in two layers in three layers in four layers

Carbon is found in all organic molecules. true false

Which behavior is most likely to indicate alcohol abuse A. Sakim has a couple of drinks and social gatherings B. Salina gets excited at the prospect of trying a new drink. C. Rashelle needs more than the usual number of drinks to feel high

The activity a cell performs is called

What is the role of splindle fibers in mitosis

Match the description in column 1 to the corresponding parts of the nervous system in column 2. A. Brings messages to your brain through your spinal cord autonomic B. If you stub your toe, this carries the message peripheral C.

when listening the levels of orginization in orginisims from the smallest to most complex, which level is just below organs in complexity

Relative to rainfall, the tundra is most like what other biome

Which artery is felt when taking the pulse at the wrist?

How does skin prevent entry of micro organism in the body