Which substance is considered a building block for all living things?

hydrogen

glucose

carbon

protein

Natural controls based on food competition tend to keep a community in balance. True/False

Which has more skin: an elephant or a mouse? Which has more skin per unit of body weight: an elephant or a mouse? Which has more skin: an elephant or a mouse? Which has more skin per unit of body weight: an elephant or a mouse?

Which term represents the rate at which the position of an object changes? a. speed b. velocity c. momentum d. acceleration

Which activity would be within the field of biology?

Where might a spring from?

The electrons of an atom occupy one or more areas of space called

The nucleus and other organelles of a neuron are primarily housed in which part of the cell? axon dendrite glial cell cell body none of the choices is correct.

What does every letter of the mRNA strand correspond to? (there is no chain to go with this question)

Is Sirius B brighter or dimmer than the sun?

The chart below shows examples from two groups of organisms, multicellular and one-celled. the tissues and organs in group a perform functions that are