The genes for purple eyes and curved wings are approximately 21 map units apart on chromosome II in Drosophila. Assume that a purple-eyed female was mated to a curved wing male and that the resulting F1 phenotypically wild-type females were mated to
purple, curved males. Of 1000 offspring, what would be the expected number of flies with purple eyes and curved wings?
A) 210 B) 540 C) 790 D) 105 E) 395
Answer: E
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Why does external fertilization typically occur much more often in aquatic animals than in terrestrial animals?
A) The gametes are hydrophobic, so they must be suspended in water to avoid clumping. B) The gametes must be produced in large numbers, which can occur only in aquatic environments. C) The gametes must be kept wet to avoid desiccation.
Your dog becomes ill and you rush him to the veterinarian's office. A technician draws blood from your dog's leg for a vet-ordered lab test. After a few minutes the lab results are given to the vet, who immediately grabs a bottle from a shelf and begins to fill a syringe with an unknown fluid. You inquire about the fluid, and the vet informs you that the fluid is necessary to manage your dog's
metabolic acidosis. Based on the information provided, what is acidosis, and what is the likely effect of the veterinarian's injection? A. Acidosis means that your dog's blood pH has dropped from its normal level, and an injection of saline is required to reverse the condition. B. Acidosis means that your dog's blood pH has increased from its normal level, and an injection of saline is required to reverse the condition. C. Acidosis means that your dog's blood pH has decreased from its normal level, and an injection of buffering solution is required to reverse the condition. D. Acidosis means that your dog's blood pH has increased from its normal level, and an injection of buffering solution is required to reverse the condition.
Homeostasis maintains various levels within a narrow range only if environmental conditions do not fluctuate much
a. true b. false
Every somatic cells has a complete set of DNA (i.e. all of your DNA).
a. true b. false