Hypothesis:explain how carbon dioxide cycles in the aquarium water through snails and Elodea

In an ecosystem, phosphate levels are usually low because: phosphorous reacts with oxygen animals use all the available phosphates phosphorous is stored in the atmosphere the weathering of rock is a slow process

Identify the causes of the high rate of teen motherhood in the US Latino population.

How does crossing-over increase variation in genes?

Which of the following statements is true of hyponatremia? a. It is a condition characterized by low blood potassium concentration. b. It occurs as a result of zinc deficiency and often leads to serious heart problems. c.

Which organisms can be treated with penicillin g (benzylpenicillin) ? (select all that apply.) ?

Match the term to its description. Match Term Definition Elliptical galaxy A) Does not have a distinct regular shape Galaxy B) Forms a perfect sphere or an ellipse and is flattened to some degree Irregular galaxy C) Is a collection of several

The outer edge of the nostril is called the

A desert area has many species of cactus and brush as well as birds, snakes, lizards, and rodents. This desert is an example of a what: climax community, pioneer species, disturbance, secondary succession.

When an organism hunts and kills another organism for food, the hunter is called A. prey. B. an herbivore. C. a predator.

Both ADP and atp contains which of these sugars A adenine B ribose C glucose D guanine