What is the best strategy for preserving biodiversity?
A) to depend on the Endangered Species Act to produce its intended consequences
B) to prevent inbreeding in small populations
C) to use genetic engineering to create new combinations of genes
D) to prevent species from becoming endangered in the first place
D
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Which one of the following is not a cell surface-type receptor?
A. G protein-coupled receptor B. steroid receptor C. ligand-gated receptor D. receptor kinase
While analyzing a sample of pond water, you discover a new organism whose body is composed of multiple cells
Upon closer inspection you are able to determine that the individual cells are highly differentiated and organized into distinct interior and exterior tissue layers. Which of the following best describes the organization of this organism? A. complex multicellular B. simple multicellular C. coenocytic D. filamentous E. eukaryotic
Exotoxins can be denatured by iodine to form ________, which are useful in vaccines.
Fill in the blank(s) with the appropriate word(s).
Which of the following is true of
deuterostomes? a. The first opening into the embryo becomes the anus. b. The first opening into the embryo becomes the mouth. c. The second opening into the embryo becomes the anus. d. The second opening into the embryo becomes the mouth. e. The first opening into the embryo becomes the anus and the second opening into the embryo becomes the mouth