What substance was responsible for a major ozone depletion in the 1900s?

James has been working in the yard all day and has suddenly discovered the muscles in his arms and legs have begun to spasm causing a painful cramping feeling. What heat stress injury is James experiencing? A. Heat Cramps B. Heat Stroke C.

Which type of plant could best compete for sunlight in a forest? A tall plant with large leaves or a tall plant with small leaves?

Plant or animal which supports a parasite

Use the balanced equation of a nitrogen cycle pathway below to support the conservation of matter and energy. N2 + 8 H - -> 2 NH3 + H2

Dvd Credit card Stereo speaker Computer hard drive The listed devices all use which force? A) X rays B) magnetism C) electricity D) ultra violet radiation

When does a wheel and axle have a mechanical advantage greater than one?

What do cells need to do between divisions to make sure that a full set of dna gets passed on to each daughter cell?

True or false: The central nervous system allows us to sense the environment

Which of the following statements is false regarding root hairs? a. they are outgrowths of endodermal cells c. they increase the surface area of the root b. they are outgrowths of epidermal cells d. they absorb water and nutrients

Why is it critical to divide the chromosome number in half?