The animal group with the highest biodiversity in the Great Barrier Reef is __________
a. birds
b. coral
c. fish
d. mollusks
D
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Refer to the accompanying figure. Recall that eggs from the same female were exposed to each of the eight treatments used. This aspect of the experimental design tested which of the following hypotheses?
A) The longer day lengths of summer trigger the development of twig-like caterpillars. B) Differences in air pressure, due to elevation, trigger the development of different types of caterpillars. C) Differences in diet trigger the development of different types of caterpillars. D) The differences are genetic. A female will either produce all flowerlike caterpillars or all twig-like caterpillars.
Both root hairs and mycorrhizae _________. (Select all correct answer options.)
A. increase the surface area for nutrient uptake B. consume carbohydrates C. increase the volume of soil accessible to the plant D. enhance the binding of the roots to the soil
Which of the following statements about nervous and endocrine signaling is false?
A. The nervous system and endocrine system are both regulatory systems, but the two systems do not communicate directly with one another. B. Endocrine signaling is generally more prolonged than nerve cell signaling. C. The nervous system transmits signals between adjacent cells using neurotransmitters, whereas the endocrine system signals with hormones. D. Neurotransmitters function only over short distances, whereas hormones can affect cells throughout the body. E. Nerve cell signaling is generally more rapid than endocrine signaling.
You discover a dog suffering from a strange disorder that is due to an autoimmune response against its own cells. Upon further investigation, you find that the cells of various tissues are loosely arranged and do not have characteristic shapes and that the animal is prone to hemorrhage as the result of poor blood clotting. Based on these results, the target of the autoimmune response could be
A) fibronectins. B) laminins. C) extensins. D) pectins. E) desmotubules.