Why do disphotic zone fishes exhibit countershading but not fishes that live in deeper waters?
What will be an ideal response?
In the mesopelagic realm there is still some light from the sun, although very little, that can be used by potential predators to make out the silhouette of prey fish. As a result, fishes in this environment tend to maintain countershading. In contrast, deeper water does not have light at all. This means that there is no need for countershading by these fishes. Fishes in deeper waters tend to be uniformly gray, dark brown, or black.
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What is significant about the findings from "split brain" patients studied by Roger Sperry and his collaborators?
A. These studies revealed that the right and left hemispheres both function primarily to enable people to understand and produce language. B. These studies revealed that the right and left hemispheres both function primarily to enable people to describe qualities of objects such as shape and texture. C. These studies revealed that the left hemisphere functions primarily in understanding and producing language while the right hemisphere functions instead in describing qualities like shape and texture. D. These studies revealed that the right hemisphere functions primarily in understanding and producing language while the left hemisphere functions instead in describing qualities like shape and texture.
Helium, neon and argon are _____
a. extremely stable because they have vacancies in their outer shells b. extremely stable because they don't have any vacancies in their outer shells c. extremely unstable because they have vacancies in their outer shells d. extremely unstable because they don't have any vacancies in their outer shells e. extremely unstable because they have vacancies in their inner shells
The first surgical antiseptic to be used was ________.
A. phenol B. iodine C. ethanol D. None of the choices are correct.
The antibiotic penicillin targets the synthesis of peptidoglycan in bacterial cell walls. What specific step of peptidoglycan synthesis does it affect?
a) transport of peptidoglycan subunits across the plasma membrance b) biosynthesis of N-acetylglucosamine and N-acetylmuramic acid c) formation of cross-links between tetrapeptide side chains d) glycolysis bonding of N-acetylmuramic acid to N-acetylglucosamine e) hydrolysis of strach to release glucose monomers