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 big is the biggest thing in the universe? a. 100 million miles across b. ten thousand decibels c. 80 million light years d. no one knows for sure

Which of the following parts of an atom have almost the same mass A: the nucleus and electrons B: neutrons and protons C: protons and electrons D: electrons and neutrons

A characteristic shared by all chordate sis what?

Though it occurs naturally human activities can increase what

Which sentence best describes what happens after sunlight hits photosystem II?

Read the following statement. Increased knowledge about the ocean has led to major changes in human civilization. Which sentence from the article BEST supports the statement above? A.

What are the steps (in the correct order) that link a change in the base sequence of a gene to a change in the phenotype of an organism like a mouse or a human? see section 16.2 (page 339).

A plant with two dominant OR two recessive alleles is said to be True breeding Cross pollinating Homozygous Heterozygous

How is it possible to say that there are 2.3 deer per square mile

Which species is an example of an autotroph? a. ladybird c. frog spawn b. bumblebee d. lotus flower