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

The alternative form of a gene controlling a given characteristic is called?

How does nuclear energy use differ from geothermal and solar energy use? a. Geothermal and solar energy both have a mining step, while nuclear energy does not. b. Geothermal and solar energy both require water, while nuclear energy does not. c.

How do prevailing winds control precipitation totals in a region?

The ancient who founded the systemized study of natural history was

Claudia, age 13, has irregular menstrual cycles. her pediatrician tells her mother that claudia is probably not ovulating at every cycle. what should claudia and her mother know about this information?

What effect does sympathetic nervous stimulation have on digestion? A. Diarrhea B. Inhibits digestion C. Enhances digestion D. Vomiting

What was a primary reason for the revived popularity of the Ku Klux Klan?

A behavioral adaptation is ... Give at least 2 examples

Heme iron is found only in foods derived from the flesh of animals, such as meats, poultry, and fish. a. True b. False

As wind travels across the water's surface, it pushes against the water, and energy in the wind is absorbed by the water. What does the interaction between the wind's energy and the water form?