This class of antibodies is responsible for many allergies and may help protect against parasitic worm infections.
A. IgG
B. IgC
C. IgE
D. IgD
C. IgE
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The bottleneck effect is thought to be responsible for the loss of genetic variability in certain populations.
Answer the following statement true (T) or false (F)
The early evolution of higher apes and early ancestors of modern humans most closely resembles
A. two streams, Australopithecus and Homo, that merge into one lineage leading to humans. B. a straight-line vine with one main trunk and many unsuccessful short branches, with only one or two forms coexisting at any one time. C. a many-branched tree with all modern forms extending back relatively unchanged until reaching the common "missing link" at an origin about 33 million years ago. D. two main trunks leading to apes or humans, and where each newly advanced species of Homo immediately eliminated any coexisting hominids. E. a complex bush with many branches and perhaps as many as ten species of hominins 2 million years ago.
Which of the following moves materials against a concentration gradient?
a. active transport b. dialysis c. facilitated diffusion d. simple diffusion e. osmosis
Bacterial capsules are (antiphagocytic/cytotoxic/exotoxic) virulence factors
What will be an ideal response?