In island biogeography, larger islands support ______ species than smaller islands.
A. more
B. fewer
C. larger
D. more recently evolved
E. more ancient
A. more
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Diffusion is slow over distances of a few millimeters, making diffusion an unsuitable mechanism for
large animals to exchange oxygen and carbon dioxide between the external environment and body tissues and cells.
Indicate whether the statement is true or false.Which microorganism is considered phytoplankton?
A. Sulfate reducers B. Nitrogen fixing bacteria C. Cyanobacteria D. Mycorrhizae
During which stage of meiosis do homologous chromosomes separate?
A) meiosis I B) meiosis II C) interphase D) cytokinesis
A bacterial gene (gene A) ordinarily makes a protein that binds to DNA. A mutation of gene A decreases the expression of another gene, gene B. We can conclude that:
A: gene A is a positive regulator of gene B. B: gene A is a negative regulator of gene B. C: gene B is a positive regulator of gene A. D: gene B is a negative regulator of gene A. E: genes A and B regulate one another.