Microfilaments (actin) are important for

A.

cell movement

B.

maintaining cell shape

C.

muscle contraction

D.

A and B only

E.

A, B and C

How do plants maintain homeostasis

What is the type of motion that exists for objects traveling in only one direction.

What happens to the eyes during death?

In what general ways are transgenic organisms useful to people today?

Typhoid fever is caused by bacteria in contaminated food or drink. In 1903, an outbreak of typhoid fever in Ithaca, New York, killed almost 80 people. In addition, more than 1,000 Ithaca residents became sick with the disease.

What forms of matter are required by animals for cellular respiration?

Many protozoa have tiny hair-like structures that beat back and forth to aid a protozoa's movement. What are these hair-like structures called?

Why is the structure of dna called a double helix? a. because each of the curved dna subunits appears twice whenever it appears b. because dna is made of two strands of nucleotides wound together in a spiral. c.

Explain how glossopteris fossils provide evidence of continental drift

If a person has memory B cells against a certain pathogen, the person is ... a) likely to develop that disease b) much less likely to develop the disease a second time c) able to spread the disease to others through physical contact d) probably