Which of the following tests is MOST useful in determining the presence of AIDS antibodies?
A) agglutination
B) complement fixation
C) neutralization
D) indirect ELISA
E) direct fluorescent-antibody
D
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Antheridia and archegonia are the two types of ____ present in bryophytes
a. sporophytes b. sporangia c. gametangia d. gemmae e. thalli
What occurs when mitosis is not followed by cytokinesis, and it results in offspring having two sets of chromosomes?
a. autopolyploidy b. alloploidy c. adaptive radiation d. dispersal
On the accompanying illustration, "A" and "B" should be labeled, respectively, ____ and _____
a. consumers; producers b. decomposers; producers c. producers; redistributors d. producers; consumers e. consumers; decomposers
Which of the following is NOT a characteristic of the sponges?
A. Sponges have an osculum, an opening in the upper body. B. Sponges can reproduce sexually or asexually. C. Sponges have three tissue layers. D. If the cells of a sponge are mechanically separated, they will spontaneously reassemble into a complete and functioning sponge. E. Sponges are filter feeders.