Which factor(s) determine a species' optimal foraging theory?
a. availability of parasites
b. availability of predators
c. energy needed to capture food and court mates
d. energy that foraging provides
e. energy needed to capture food and the energy that the food provides
ANSWER: e
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What is separase?
A. A protein that marks a protein called securin for destruction. B. A protein that is part of the cohesin complex. C. A protein that destroys cohesin through its protease activity. D. A protein that targets the mitotic cyclin for degradation.
Which statement is true?
a. Horizontal gene transfer can only occur between single-cell organisms from the Archaea and Bacteria domains. b. The tree of life phylogenetic model proposed by Darwin has been completely abandoned by modern science. c. Phylogenetic models are necessarily incomplete descriptions of evolutionary relationships between organisms. d. The most common form of horizontal gene transfer occurs when one organism consumes another organism.
The above figure represents
a. membrane attack complex; pores in bacterial cell b. macrophage attack complex; fluids released from pores c. pores for mucus secretion ciliated lung tissue d. macrophages; muscle tissue e. none of these
The immunoglobulin class that is the only one capable of crossing the placenta is
A. IgA. B. IgE. C. IgM. D. IgG. E. IgD.