If two organisms cannot mate due to physical differences, it is known as temporal isolation
Indicate whether the statement is true or false.
ANS: F, mechanical
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Which tissue type, or organ, is NOT correctly matched with its germ layer tissue?
A) nervous â€" mesoderm B) muscular â€" mesoderm C) stomach â€" endoderm D) skin â€" ectoderm E) skeletal â€" mesoderm
A G protein:
A. is a component of a signal-transduction pathway that is coupled to a G proteincoupled receptor. B. is composed of three subunits and is inactive when bound to GDP. C. releases GDP and binds to GTP when associated with an activated receptor. D. becomes deactivated when bound GTP is dephosphorylated to GDP. E. All of these choices are correct.
Which of the following events could occur if global warming continues at a rapid rate?
a. Low-lying land areas may be submerged. b. Tropical diseases may spread north. c. Tropical species may be able to survive in more northern climates. d. all of these
Consider the Calvin-Benson cycle and the noncyclic photosynthetic pathway. Why is the cyclic pathway so
important?
What will be an ideal response?