What is the correct sequence of organisms if a community is going through secondary succession?a. grasses establish themselves in the communityb. shrubs establish themselves in the communityc. soil formation occursd. trees establish themselves in the community
A. a - b - c - d
B. c - a - d - b
C. a - c - b - d
D. c - a - b - d
E. d - c - a - b
Answer: D
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A. substrate-level phosphorylation B. the reverse TCA cycle C. electron transport to generate proton motive force D. the use of bacteriorhodopsin
Viruses are the cause of various diseases such as polio, HIV, or the flu. However, viruses are also very helpful to our environment. In what way can viruses be beneficial to the environment?
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Carbon-12 and carbon-13 are different in the number of their _____.
A. neutrons
B. electrons
C. protons
D. protons and electrons
The statement "Natural selection should favor pathogens that strike an optimal balance between the costs and benefits of harming their hosts" describes ________
A) the coincidental evolution hypothesis B) the shortsighted evolution hypothesis C) the trade-off hypothesis D) the energy-balance hypothesis