What do cells use to get energy only when carbohydrates are not available?

How many chambers are found in the heart? What other group of organisms would have this same number of chambers?

Which of the following statements is true is it A. atoms exist in more types than molecules do or B. molecules result when atoms lose electrons or C. atoms bond with one another in a molecule or D. molecules result when atoms acquire extra neutrons.

The process of earth magnetic pole changing places is called.

What is the advantage of growing genetically engineered Bt crops over spraying Bt on the crops?

He discusses neural implants, which are used to counteract the effects of various brain diseases.

How are biomes related to ecosystems?

What is the term for the flexible material that forms the structure of the ear? A. Cartilage B. Obliques C. Spongy tissue D. Osteoblast

Suppose you remove your test cultures from the incubator and notice that one of them-a known fermenter-has a gas bubble in the Durham tube. Knowing that fermenters frequently produce gas, you ignore the bubble and proceed to the next step.

In peas, yellow seed color (y) is dominant to green seed color (y). which describes an organism that has nonidentical alleles for seed color? yy and has green seeds yy and has yellow seeds yy and has yellow seeds yy and has green seeds

What would you expect to happen if sea otters were removed from this food web? Check all that apply. The population of elephant seals would decrease. The population of kelp crabs would increase. The population of kelp would increase.