In a leaf, where are the most chloroplasts
found?
a. the phloem
b. the palisade mesophyll
c. the spongy mesophyll
d. the upper epidermis
e. stomata
B
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The figures above represent three hypothetical populations; each circle is an organism. Write the letter of the pattern that you would expect to find. Food is most abundant near waterholes in the desert
A. A B. B C. C
Radiation from natural sources (as opposed to sources resulting from human activity) is called
____________________ radiation. Fill in the blank(s) with the appropriate word(s).
Some species require a large and diverse range. Although it may not significantly decrease the overall size of the range, how might fragmenting the range with a freeway or neighborhood lead to the extinction of the entire population, even if
sufficient food is available in either region to sustain two smaller populations? Suggest a compromise that would allow the population to survive and allow for the road project or neighborhood.
Synthetic ________, such as 2,4-D, are routinely used to control weeds and are applied in concentrations higher than would occur in the plant tissues.
A. ethylene B. auxins C. gibberellins D. cytokinins