In aquatic ecosystems one of the major factors that determines the carrying capacity is the
A. amount of nutrients in the water.
B. amount of competition among different species.
C. quantity of plants in the ecosystem.
D. natality.
A. amount of nutrients in the water.
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In what way does prokaryotic fission resemble eukaryotic mitosis?
A. Mechanism of chromosome movement B. Production of genetically identical descendant cells C. Chromosome attachment D. Production of a cytoskeletal framework for separating chromosomes E. Horizontal gene transfers
After lowering its body temperature, a shaved shrew would lose less heat by convection.
a. true b. false
Coniferous forests are important ecosystems, particularly in higher latitudes and altitudes. How are conifers of direct
economic importance to humans? What will be an ideal response?
The principle underlying how salmon were genetically engineered to grow faster is the
A) removal of a gene responsible for feeling full after eating. B) replacement of inducible to constitutive hormone production. C) resistance to bacterial infections which waste metabolic energy in the salmon to fight off. D) addition of genes to enhance blood circulation and tissue development.