Proteins that are embedded in the cell membrane have the function of ___.

a

transporting material across the cell membrane

b

recognizing other cells

c

Both choices

d

Neither choice

Describe the undesirable effects of land pollution due to insecticides (biological magnification)

cientists classify clams as consumers. Which observation about clams provides the strongest evidence for this classification? A. Young clams are able to move from place to place. B.

During which phase are sister chromatids separated

When a neuron transfers an impulse to another neuron or to a muscle cell, what is that location that receives the impulse called? a. synapse b. dendrite c. receptor

What is the path of the electrical impulse that travels through the heart causing the atrial-ventricular contraction?

4. A tree dropping its leaves in the fall to conserve water and avoid freezing during winter is an example of?

Which is a single-celled fungus? A. mold B. mushroom C. alga D. yeast

Explain problems with using low-tar, low-nicotine cigarettes.

Some students are comparing the parts of a cell to the parts of the body. Which part best represents the cell membrane and why?

What is the difference between the nitrogen and carbon cycles?