Utilizing more motor units for stronger muscle contractions is called
A. fast-twitching.
B. fatigue.
C. aerobic capacity.
D. recruitment.
E. insertion.
D. recruitment.
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Draw a microbial-based nitrogen cycle. In the open ocean there is plenty of sunlight and carbon dioxide for primary production, yet photosynthesis is limited in the open ocean compared to other aquatic environments
What limits photosynthesis in the open ocean? What will be an ideal response?
Which of the following BEST describes the process of nitrification?
a. N2 ? NH4 + b. NH4 + ? N2 c. N2 ? NO3 ? d. NO3 ? ? N2 e. NH4 + ? NO3
A common food intoxication is caused by enterotoxin-producing strains of ________.
A. Staphylococcus epidermidis B. Staphylococcus saprophyticus C. Streptococcus agalactiae D. Staphylococcus aureus E. Streptococcus pyogenes
Darwin's theory was strongly founded on the geographic distances traveled by migrating species, or occupied by their populations. A theory of "island biogeography" was introduced in 1967, further elaborating on importance of the distances traveled, or areas occupied by populations. A specialized field of "landscape ecology" concerns patches of habitat, and distances between them, along with movement corridors, or barriers to movement. With all of these, the individuals that move about and successfully reproduce in the population
A. can be aided by human construction of artificial corridors of movement, such as railways and roadways. B. can be blocked by human construction of cities, or modification of vast landscapes for agriculture. C. demonstrate gene flow that can counteract trends in selection and other allele frequency changes. D. can reunite smaller groups of the species population that were previously isolated. E. All of the answer choices are correct.