Phosphorus is often scarce in soils, so a deficiency in phosphorus may limit plant growth. plants need this essential element because it is a component of what organic molecules? (select all that apply.)

The pink parts of the graph represent the pH range where some common freshwater organisms survive. If the pH of a lake were to start at 3 and become more basic, at what pH would these freshwater organisms begin to die out?

What human activity would have the most significant effect on the temperature of the earth? A) deforestation B) producing smog C) producing CFCs D) burning fossil fuels

Which of the following would NOT be considered a vestigial structure? a. fingernails b. wisdom teeth c. your appendix d. Your tail bone

Are amino acids outside the active site important for optimal function of the enzyme? Explain your response.

There are many classes of compounds that are pharmaceuticals. So called 'Small Molecules' such as aspirin, have been useful in medicine and pharmacy for years.

Compare and contrast some features of prokaryotic and eukaryotic cells. Match each statement with the correct cell type. 1. Lack of membrane-bound nucleus. 2. DNA in cytoplasm. 3. Single, circular chromosome. 4. Membrane-bound nucleus. 5.

All of the following are transmembrane pumps that facilitate active transport except? a) ATP-driven pumps b) Channel pumps c) Light-driven pump d) Coupled pumps

What features of protein folding and function are revealed by calmodulin and prions?

What materials are part of the three most important cycles in ecosystems

An allele responsible is round on a sex chromosome