Nitrogen-fixing bacteria live in protective nodules (bumps) on the roots of some plants. These bacteria are able to convert gaseous nitrogen from the air into a form of nitrogen that the plants can use. Which type of relationship is this?

Why did camels evolve?

The diagram shows a cellular process in which a double-stranded molecule of nucleic acid gives rise to a single-stranded molecule of nucleic acid. Which best describes the process shown? - RNA is translated into DNA. - DNA is translated into RNA.

The physiology instructor is talking with the class of nursing students. what would the instructor explain to the students is the connecting link between the nervous system and the endocrine system?

A student compares two different proteins. The student notices that the primary structures differ in both the number of amino acids and the sequence of amino acids. Based on this information, what can the student infer?

Which does erosion do? 1) cements rocks 2) forms rocks 3) breaks rocks apart 4) moves bits of rock and soil

Describe how eukaryotic plant cells store and remove waste.

Briefly discuss why americans are encouraged to aim for the recommended levels of sodium and potassium in their diets in relation to disease prevention

Why are frogs absent on the galagos and other oceanic islands?

Gustatory receptors are found in the taste buds.

The soft parts of dead plants and animals do not often become fossils becuase they decompose rapidly. List three substances that might prevent decay