Cri-du-chat syndrome is a human disorder caused by which type of chromosomal defect?
What will be an ideal response?
terminal deletion
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Conifers produce copious amounts of pollen during reproduction. What would be a likely consequence of a significant reduction in the amount of pollen produced by conifers?
A. There would be little effect because coevolved pollinators would still be able to transfer pollen from the male cones to the appropriate female cones. B. There would be a significant negative effect on the viability of seeds because double fertilization could not occur, so there would be no food available for the growing embryo. C. There would be a decrease in the number of seeds produced because the chances of pollen reaching a female cone of the same species would be reduced. D. There would be a significant decrease in the genetic diversity of embryos, but little effect on the number of seeds as only one pollen grain is necessary to fertilize a single female cone.
How does an electromyograph (EMG) measure muscular contraction?
What will be an ideal response?
Plasmodial slime molds are described as acellular because they
A) are heterotrophic. B) have no nuclei. C) reproduce asexually. D) have no membranes surrounding their nuclei. E) lack DNA.
The broad band of loose connective tissue beneath the mucosa that contains blood vessels, lymph, and nerves is called the
A. muscularis. B. submucosa. C. mucosa. D. serosa. E. diverticulosis.