When was the hydrologic cycle discovered?

How has Linnaeus's taxonomy system changed over the centuries?

How do the nitrogen bases pairs join in DNA?

If the cell uses 2 ATP molecules at the beginning of glycolysis, how does it end up with a net gain of 2 ATP molecules?

How do plants maintain homeostasis? Select all that apply. a By exchanging gas through stigmas. b By exchanging gas through stomata. c By closing stomata to prevent water loss. d By altering the activity within a cell with chemical transmitters.

An consists of all the living organisms in an area and the non-living aspects of the environment.

Which of the following elements can be found in all lipids? A) Oxygen B) Sulfur C) carbon D) Hydrogen E) Nitrogen

When a bird eats a small insect it can be considered a secondary consumer but what is the bird considered as when it eats seeds?

Desert animals, such as the kangaroo rat, need to conserve water. These animals have larger kidneys than do animals that live in moist environments and thus need not conserve water.

What is the function of a nucleus in a cell the nucleus A. controlls the cells activity B. the nucleus identifies the cell as belonging to a plant C. the nucleus determines what substances enter and leave the cell D.

Which best describes emerging scientific ideas? a. never been tested b. unpublished c. supported by most, but not all, scientists d. not studied by many scientists