Which is true concerning quiet/REM sleep?

What will be an ideal response?


SWS predominates in the sleep cycles early at night while, in the last part of the night, the proportion of REMS is increased

Biology & Microbiology

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Semen components are produced by

a. the prostate gland. b. the seminal vesicles. c. the testes. d. the urinary bladder. e. all except "the urinary bladder."

Biology & Microbiology

Which of these options would be the most efficient human food source?

A) beef B) soybeans C) chicken D) swordfish

Biology & Microbiology

Which examples would be considered different species under the biological species concept? Check all that apply.  

_____  Two bear species are able to breed in zoos, but have separate ranges in nature. _____  Two skunk species look morphologically similar, but are unable to interbreed. _____  Two snake species look different, but often form fertile hybrids. _____  Two plant species with no gene flow between them. _____  Two tree species have different leaf shapes, but form hybrids in their overlapping ranges. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required?   Gather Content · What do you already know about the biological species concept?   Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer?   Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?

Biology & Microbiology

The secretory systems of Type III and Type IV pathogenic bacteria differ in their mode of attacking cells in which of the following ways?

A. Type III systems bind to the cellular membrane by slimy mucilage and toxins diffuse across the membrane, whereas Type IV systems infect materials using pili as transfer tubes. B. Type IV systems bind to the cellular membrane by slimy mucilage and toxins diffuse across the membrane, whereas Type III systems infect materials using pili as transfer tubes. C. Both systems attach to cells in the same way but they differ merely in the chemicals that they inject into the host cell. D. Type III systems use flagella modified as "syringes" to inject materials into cells they are infecting whereas Type IV systems use modified pili as transfer tubes. E. Type IV systems use flagella modified as "syringes" to inject materials into cells they are infecting whereas Type III systems use modified pili as transfer tubes.

Biology & Microbiology