A community includes both living and nonliving components
Indicate whether the statement is true or false
FALSE
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Predict which of the following would happen if a plant was exposed to a toxin that made the thylakoid membranes permeable to hydrogen ions
A. The hydrogen ion gradient across thylakoid membrane would be eliminated. B. The hydrogen ions necessary to generate NADPH from NADP+ would no longer be present. C. The oxidation and reduction of the protein complexes in the electron transport would be prevented. D. A reversal of the hydrogen ion gradient across the thylakoid membrane would result in a higher pH in the thylakoid lumen than in the surrounding stoma.
How does peer review influence the development of scientific theories?
A. Peer review allows other scientists to know what is current in their field. B. Careful evaluation of research results by other scientists ensures that only solid and legitimate research results are published, and helps prevent faulty research or false claims from being viewed as scientific fact. C. Peer review increases competition among scientists and thus increases the quality of the published work. D. Peer review makes it extremely difficult for work to be published other than earth-shattering scientific theories.
All of the following describe characteristics of sclerenchyma cells, except which?
A. Their function is primarily to transport oxygen and carbon dioxide throughout the leaf. B. They have thick, tough secondary walls. C. Their secondary walls may be impregnated with lignin. D. They form fibers and sclereids. E. They lack living protoplasts when mature.
Between the 1930s and the 1970s, the amount of all of the following except ____ increased in Lake
Erie.
a. coliform bacteria b. phosphorus c. phytoplankton d. sewage e. fish population sizes