The label "1" in the accompanying figure represents ________
A) the "root" for the tree
B) the common ancestor for the hypothetical lineage
C) both A and B
D) None of the above.
C
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Compared with sponges, cnidarians have a wider array of cell types permitting more sophisticated tissue functions. These functions include (select all that apply):
A. secretion of digestive enzymes. B. muscle contraction/movement. C. the ability to sense the environment via a network of nerve cells. D. the ability to communicate within the organism using hormones. E. none of these
The light-dependent generation of NADPH is referred to as ________.
Fill in the blank(s) with the appropriate word(s).
The PARA-TECT Cryptosporidium/Giardia test kit uses which of the following formats for detection?
a. Direct fluorescent antibody (DFA) b. Indirect fluorescent antibody (IFA) c. Enzyme immunoassay (EIA) d. Probe
Sex chromosomes are ____
a. completely different between the two sexes b. partially homologous but also have unique regions c. found only in males d. unable to line up properly at the metaphase plate e. completely homologous but always have different alleles