The ancestors of elephants inhabited every continent except Antarctica and Australia. But the Asian and African elephants are the only ones to survive. Why?

Colors of light most useful in photosynthesis are A) green, yellow, and orange B) red, violet, and blue C) infrared, red, and yellow D) red, white, and blue

2. All genes are activated and expressed all the time. True False

Which of the following is a source of chemical weathering that has been exacerbated by air pollution from industrial plants and car emissions? A. acid rain B. oxidation of iron C. formation of clay D. dissolving of limestone

Diffusion can be defined as active transport of particles up a concentration gradient. movement through a cell membrane using energy from ATP movement of particles from a region of high concentration to a reaigon of low conentration movement of

Puffer fish poison blocks voltage-gated sodium channels like a cork. what effect would this neurotoxin have on the function of neurons?

GTPases serve in many signal transduction pathways and the presence of GTP or GDP dictates where the pathway is on or off, respectively.

What is the difference between eukaryotic and prokaryotic cells? A. eukaryotic cells are found in animals, while plant cells are comprised of prokaryotic cells. B. eukaryotic cells have a plasma membrane, which is lacking in prokaryotic cells. C.

Which of the following biotic organisms makes its own energy from inorganic substances? producers consumers decomposers minerals

Which phrases describe both Jupiter and Saturn? Check all that apply. (atmosphere contains hydrogen and helium) (has 50 or more moons) (has a density less than that of water) (has multiple rings) (has fast winds and storms)

Which process releases 2260 joules of heatenergy per gram of water into the environment? (1) melting (3) condensation (2) freezing (4) evaporation