Why do red and blue light drive photosynthesis more effectively than green light?
a. because chlorophyll cannot absorb red and blue light
b. because chlorophyll can absorb green light
c. because chlorophyll can absorb red and blue light
d. because chlorophyll cannot absorb green light
Ans: c. because chlorophyll can absorb red and blue light
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Reduction or elimination of a behavioral response due to a repeatedly presented stimulus is called ____
Fill in the blank with the appropriate word.
Sympatric speciation differs from allopatric speciation because in sympatric speciation
A. a population becomes geographically isolated. B. two populations of the same species merge to form a single population. C. polyploidy must first arise. D. hybrid zones form. E. there are no physcial barriers against interbreeding.
In what way would life be different if the element carbon was absent?
A. Life would not exist in any shape or form. B. There would be no organic compounds. C. There would be no inorganic compounds. D. The concept of pH would not exist.
When a blood vessel is cut, why does vasoconstriction take place?
a. To expose collagen fibers to which platelets can adhere b. To trigger the release of platelets from the surrounding tissues c. To initiate the activation of thrombin d. To entrap white blood cells e. To reduce the flow of blood