In Connell's experiments with the barnacles Chthamalus stellatus and Semibalanus balanoides, the potential distribution of each species is known as the
A. competition zone.
B. mortality rate.
C. fundamental niche.
D. defined mutualism.
E. tidal boundary.
C. fundamental niche.
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HIV virus particles that have evaded destruction by cytotoxic T cells persist in ________.
A. dendritic cells B. helper T cells C. basophils D. memory B cells E. cytotoxic T cells
A DNA library is
A. a collection of recombinant vectors containing DNA fragments of a given organism. B. a collection of books about clones. C. a line of bacteria that contains a DNA fragment of interest. D. a series of restriction enzymes that can be used to produce a variety of sizes of DNA fragments. E. a collection of recombinant plasmids containing a particular gene from many different organisms.
Electrical signals are converted into chemical signals at the end of a(n) _____
a. neuroglial cell b. muscle cell c. microvillus d. neuron cell body e. axon
Fertilization of an egg usually occurs in the upper third of an oviduct
Indicate whether the statement is true or false