The heart, liver, and stomach are each examples of

a. a nerve.

b. a tissue.

c. an organ.

d. an organ system.

A universal genetic code allows for what

Multicellular organisms are made up of different types of differentiated cells. Given that all cells in an organism have the same DNA-and thus the same genes-explain how it is that different genes can be expressed only in certain types of cells.

Why is there controversy about using embryonic stem cells?

Why does a clam shell have a good possibility of being preserved? because it is alive because it is dead because it is a hard body part because it is a soft body part

From the third month to term, the developing human is called a (n) :

Invertebrates are the most commonly found fossils because they:

Recent studies have found traces of the insecticide DDT accumulated in the fat tissue of many wild animals. A correct explanation for this accumulation is that

Cell engulfs microorganisms in cell "eating": pinocytosis active transport phagocytosis passive diffusion facilitated diffusion

Which kind of organism is an autotroph? consumer producer decomposer herbivore

Which process connects glycolysis and the citric acid cycle?