Insects are vectors of many diseases that affect humans. List several diseases and their insect vectors. What will be an ideal response?
Malaria and yellow fever are transmitted by mosquitoes; Riketts may be transmitted by lice; houseflies
may transmit typhoid and dysentery; tsetse flies may transmit African sleeping sickness; fleas may
transmit bubonic plague.
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Biological membranes contain bilayers containing mostly ______
A. oils B. prostaglandins C. triglycerides D. cholesterol E. phospholipids
The external covering of the body is produced by
a. the ectoderm only. b. the endoderm only. c. the mesoderm only. d. the ectoderm and endoderm. e. all of the germ layers.
Which of the following is not a benefit of biodiversity?
a. climate regulation b. development of novel medicines c. new and better crop plants d. biological magnification e. production of freshwater
Which statement is correct?
A. Pharyngeal clefts form internally between arches while pharyngeal pouches form externally. B. Pharyngeal clefts form externally between arches while pharyngeal pouches form internally. C. Pharyngeal Arch I grows over Pharyngeal Clefts I-IV, obliterating them. D. The ear is formed across Pharyngeal Cleft II, intervening mesenchyme, and Pharyngeal Pouch I.