Fucus, a conspicuous intertidal alga, belongs to the phylum:
1.Chlorophyta
2.Rhodophyta
3.Phaeophyta
4.Anthophyta
3
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Why can't "scientific creationism" be considered a science? Check all that apply.
_____ It is not supported by any empirical observations. _____ It does not obtain its principles from observation, as does science. _____ Its assumptions lead to no hypotheses that could be tested and possibly disproved. _____ The idea of creation by a supernatural agency lies outside the realm of science. _____ Only non-scientists believe it.
Why is it necessary for males of some species of anglerfish to parasitize the females?
What will be an ideal response?
Laboratory simulations provide indirect evidence
that organic compounds such as __________ and __________ self-assemble spontaneously under conditions like those thought to have prevailed on the early Earth. Fill in the blank(s) with the appropriate word(s).
Antibodies binding to their antigen can activate complement. This, in turn, leads to opsonization of the antigen-antibody complexes. What is meant by opsonization?
A. Clumping of antibody-antigen complexes into insoluble substances. B. Clumping together of the antibody-antigen complexes. C. Coating antibody-antigen complexes, making them more easily phagocytized by macrophages and neutrophils. D. Lysis of the cells bearing the antibody-antigen complexes.