Explain why we have a more complete historical record of diversity in North American dinosaurs than we do of rain
forest organisms What will be an ideal response?
Few fossils of tropical rainforest organisms have been found because their remains decay
extremely rapidly on the forest floor.
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The microsporidian Brachiola gambiae parasitizes the mosquito Anopheles gambiae
Adult female mosquitoes must take blood meals for their eggs to develop, and it is while they take blood that they transmit malarial parasites to humans. Male mosquitoes drink flower nectar. If humans are to safely and effectively use Brachiola gambiae as a biological control to reduce human deaths from malaria, then how many of the following statements should be true? 1. Brachiola should kill the mosquitoes before the malarial parasite they carry reaches maturity. 2. The microsporidian should not be harmful to other insects. 3. Microsporidians should infect mosquito larvae, rather than mosquito adults. 4. The subsequent decline in anopheline mosquitoes should not significantly disrupt human food resources or other food webs. 5. Brachiola must be harmful to male mosquitoes, but not to female mosquitoes. A) 2 and 5 B) 1, 2 and 4 C) 1, 2, and 4 D) 2, 3, 5 E) 3 and 4
Honeybees and the flowers they feed on are called __________, which are composed of large,
complex cells with many specialized compartments.
a. prokaryotes b. macromolecules c. microbes d. eukaryotes
__________, or four-legged walkers, evolved from lobe-finned bony fishes. Fill in the blank(s) with the appropriate word(s)
Fill in the blank(s) with the appropriate word(s).
If you cut a herbaceous stem and observe fluids continually seeping upward and out of the cut, it is most likely due to
A. active transport by phloem. B. tension caused by transpiration. C. cohesion to the xylem walls. D. turgor pressure. E. root pressure.