Turtle hatchling survivorship rate is low in many turtle species due to predation. Amanda researched the predatory rate on a species of turtle eggs in the Red River. The eggs were harvested from trapped turtles, and the egg's cloaca film (reproductive discharge) was either washed off or left on once gathered. Research suggests that predators use the female's cloaca scent to locate the eggs.The eggs were only handled when wearing gloves and then reburied along islands where the turtles were trapped. The nests were monitored by cameras and manually on foot, and data on nest predation was recorded.Based on the experimental design, what is the independent variable?
A. inducing egg laying
B. time eggs spent in ground
C. number of hatchlings
D. no cloaca film on eggs
Answer: D
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Reproductive isolation in Darwin's finches was studied by Podos. He measured beak size and found a correlation between this and the finches'
A. song. B. ability to attract certain mates. C. flight patterns. D. song and ability to attract certain mates. E. flight patterns and song.
The respiratory membrane consists of alveolar epithelium, capillary endothelium, and ____
a. a lubricating secretion b. a connective tissue layer c. a fused basement membrane d. gas e. a pleural membrane
Which of the following statements is true concerning how energy drinks work?
A. It is the amount of food additives in energy drinks that provides the energy felt. B. Energy drinks contain vitamins which are known to interact with cellular respiration pathways, helping provide energy. C. Energy drinks contain vast amounts of carbohydrates and proteins that enter into cellular respiration pathways, directly providing ATP energy. D. All energy drinks contain caffeine, as it is a known stimulant that increases energy levels. E. Energy drinks contain numerous vitamins and minerals which are known to directly act as stimulants.
If a person uses Percocet, a morphine relative, to which of these drugs might that person develop cross-tolerance?
A) ecstasy B) marijuana C) heroin D) cocaine