To best assess the species diversity in one area, one should measure ________.
A. the number of species in the area
B. the relative abundance of the dominating species of the area
C. both the number of species and their relative abundance in the area
D. we cannot assess accurately the species diversity of one area
Answer: C
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A cross between two purple flowers that are heterozygous for their traits is an example of a ________
a. monohybrid cross b. dihybrid cross c. Punnett square d. test cross e. None of these choices.
Nutrients are reintroduced into the upper reaches of the oceans from deeper areas by the process of:
a. wind and ocean currents. b. respiration of marine animals. c. excretion of wastes by animals. d. sinking of dead organisms. e. their attachment to floating plankton.
Four of the five events listed below occur after
fertilization. Select the exception. a. cleavage b. gametogenesis c. blastula formation d. gastrulation e. organogenesis
What are the three main tissues in a plant?
(a) leaf, root, and stem tissue (b) flower, root hair, and fruit tissue (c) Dermal, vascular, ground tissue (d) Internode, node, and petiole tissue (e) They only have two tissues