How much of earths atmosphere is made up of nitrogen and oxygen? A. Less than 1 percent B. close to 99 percent C. 50 percent D. Between 24 and 75 percent

Scuba divers often visit a coral reef off the coast of South Central America. There has been a great increase in tourism and diving in this area. Which best describes the effect this will have on the reef.

Animals are often grouped as A. vertebrates or invertebrates. B. heterotrophs or autotrophs. C. walkers or crawlers. D. swimmers or runners.

The pea plant (pisum sativum) is a good choice for studying heredity because it

How can you best protect yourself from possible bloodborne pathogen transmission when providing care? a. ask the victim first if they have any communicable diseases?

What is the homophone for the (coarse, course) Canavas made a sturdy tent

Define radioactivity. if an element has three isotopes, which of them is most likely to be a radioisotope

Which species will have the strongest mass shift on a magnetic susceptibility balance? -O2 -F2 -CO -NO

1) The formula for potential energy is PE = mgh, where mis mass, gis the acceleration due to gravity, and his height.

If limestone is exposed to the right amount of heat and pressure what might it become A Sandstome B Shale C Clay D marble

Cellular respiration occurs in: select one: a. plants only b. animals, plants, and bacteria. c. animals only d. bacteria only e. animals and bacteria only