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Penicillin works best on what type of prokaryote   [a]A) gram negative bacteriaB) archaeaC) endospore producing bacteriaD) gram positive bacteriaE) mycoplasma bacterial species

Cows are herbivores, thus they are [a]A) primary producersB) primary consumersC) secondary consumersD) secondary producers  

Which of the following has the greatest effect on the rate of chemical cycling in an ecosystem? [a]A) the rate of decomposition in the ecosystemB) the production efficiency of the ecosystem’s consumersC) the trophic efficiency of the ecosystemD) the location of the nutrient reservoirs in the ecosystem

A chemical produced by animals that serves as a communication to animals of the same species [a]A) pheromoneB) a neural markerC) a chemical inducerD) the location of the nutrient reservoirs in the ecosystem

 In the classification of joints, which of the following is true?

Which true about light in aquatic environments?A) Water equally reflects and absorbs all wavelengths of light.B) Longer wavelengths penetrate to greater depths.C) The zone where light stops penetrating is call aphotic.D) Most photosynthetic organisms avoid the surface where the light is too intense.

Which of the following do scientists believe migrating birds use? [a]________.I) the stars in the night skyII) the sun during the dayIII) the magnetic field of the EarthA) only IB) only IIC) only IIID) I, II, and III

Every lever system has a lever, which is a rigid bar or rod. In human lever systems (part of the muscular and skeletal systems) what anatomical part functions as the lever?

Below are sketches of histograms for three lists. In scrambled order, the averages are 40, 50, 60.  Match the histograms with the description: 

Typically, organizations in the U.S. emphasize the importance of the ______.  Organizations in Japan emphasize the importance of the ______.