Which of the following circumstances would cause exponential growth to move into a logistic growth phase?
A. habitat alteration resulting in the conversion of 1,200 acres of forests into agricultural fields and housing developments
B. the introduction of a non-native predator into the environment
C. a reduction in the number of females within the population
D. a large increase in the population over three generations
E. All of these would cause exponential growth to move into logistic growth.
Answer: E
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Which of the following methods can plants use to acquire immobile nutrients (e.g., zinc) or nutrients not in readily accessible forms (i.e., the nitrogen in N2)? Select all correct choices
A. Plants can introduce acid-like compounds into the soil. B. Plants can form symbiotic relationships with bacteria. C. Plants can form symbiotic relationships with fungi. D. Plants can introduce protons into the soil.
"Bacterial transformation" is a bacterium's ability to:
A) produce restriction enzymes. B) connect DNA fragments once they are cut with restriction enzymes. C) produce proteins from another organism's genes. D) take up DNA from its surroundings.
A possible explanation for a natural event, based on observations and past knowledge, is a
What will be an ideal response?
Characteristics that have arisen in organisms as a result of common evolutionary descent are said to be ________ characteristics.
A. homoplastic B. derived C. ancestral D. adaptive E. homologous