Animals that match their internal osmotic pressures to those of their external environments are called ____
Fill in the blank with the appropriate word.
osmoconformers
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What information is critical to the success of polymerase chain reaction (PCR) itself?
A) The DNA sequence of the ends of the DNA to be amplified must be known. B) The complete DNA sequence of the DNA to be amplified must be known. C) The sequence of restriction-enzyme recognition sites in the DNA to be amplified must be known. D) The sequence of restriction-enzyme recognition sites in the DNA to be amplified and in the plasmid where the amplified DNA fragment will be cloned must be known.
Invasive Eurasian grass species can outcompete native North American grasses through
A. secretion of allelochemicals. B. producing more viable seeds. C. producing seeds year-round. D. avoiding grazing animals. E. faster seed germination.
An embryo develops from the
a. blastomere. b. gastrula. c. syncytiotrophoblast. d. trophoblast. e. inner cell mass.
Traits which by logic should show less genetic variation because of their close association with reproduction fall into which category?
A) life-history traits B) behavioral traits C) physiological traits D) morphological traits