A population with an S-shaped growth curve is said to exhibit _____________ growth.
a. logistic
b. density-dependent
c. exponential
Ans: a. logistic
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When electrons flow along the electron transport chains of mitochondria, which of the following changes occurs?
A) The pH of the matrix increases. B) ATP synthase pumps protons by active transport. C) The electrons gain free energy. D) The cytochromes phosphorylate ADP to form ATP. E) NAD+ is oxidized.
Both Charles Darwin and Alfred Russel Wallace acknowledged the influence of the economist Thomas Malthus in the development of their ideas about natural selection. Specifically, Malthus' ideas about geometric population growth implied that:
A. resources in every generation would be limited, so individuals in every generation would have to compete for those resources. B. only the largest and strongest individuals would survive. C. organisms should have as many offspring as possible. D. organisms should have a few, very fit offspring who can compete for scarce resources. E. all of the answer options are correct.
What are the differences between complete dominance and codominance?
What will be an ideal response?
In peas, Mendel found that tall plants and yellow peas are dominant. The phenotype for a pea plant with the genotype
TTyy would be: a. intermediate height with greenish-yellow peas. b. short with green peas. c. short with yellow peas. d. tall with green peas. e. tall with yellow peas.