Which factor is most likely to lead to allopatric speciation within a population of fish in a river?
a. The largest males in the population claiming the best nesting sites
b. A new food source becoming available.
c. Introduction of a new predator into the river.
d. Increase in pesticide use by the surrounding communities.
e. A dam being established on the river.
e
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How many rounds of the Calvin cycle are necessary to complete the synthesis of a sixcarbon sugar molecule? Explain your answer
What will be an ideal response?
In Arabidopsis plants, about 10% of its genome is devoted to processes tied to which molecule?
A. Gibberellins B. Phytochrome C. Ubiquitin D. Rubisco E. Auxin
What would happen if a neuron with a resting membrane potential of ?100 mV and a threshold level of
?70 mV received three IPSPs of ?5 mV and four EPSPs of ?10 mV in close succession? What will be an ideal response?
Which of the following elements is NOT correctly matched with its cellular function?
A) nitrogen — needed for amino acid synthesis B) phosphorus — incorporated into nucleic acids C) sulfur — used for synthesis of thiamin and biotin D) magnesium and potassium — required as cofactors for enzymes E) phosphorus — used for production of carbohydrates.