When Terry Irwin collected beetles from a tree to catalog the species, he found that ____ of the individual beetles he
collected belonged to species not yet described.
a. less than 10%
b. 25%
c. 50%
d. 75%
e. more than 90%
ANSWER: e
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Where do mesophyll cells usually obtain CO2 for photosynthesis?
A. the air spaces that surround them B. the xylem C. other mesophyll cells D. from cellular respiration E. None of the answer options is correct.
Which statement is not true about the rod cells? a. Detect dim light
b. Least abundant photoreceptor. c. Contain the pigment rhodopsin. d. Respond to changes in light intensity. e. Most abundant photoreceptor.
What can you conclude from these data?
A) Sample 1 is likely from tissue in the middle of the plant because most cells are in interphase. B) Sample 2 is likely from tissue in the middle of the plant because there are fewer cells in telophase than are in prophase C) Sample 2 is likely from tissue in the middle of the plant because fewer cells are in any mitotic stage. D) Sample 1 is likely from tissue in the middle of the plant because fewer cells are in any mitotic stage than in sample 2.
What hazardous material do fluorescent light bulbs contain, making it important to dispose of them properly?
A- aluminum B- carbon C- lead D- uranium E- mercury