Which cell structure is most likely responsible for sensing gravity?
A. Golgi apparatus
B. apical meristem
C. amyloplast
D. central vacuole
E. chloroplast
Answer: C
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Refer to the paragraph on dark-eyed junco birds. The UCSD campus male junco population tails were, on average, 36% white, whereas the tails of males from nearby mountain populations averaged 40—45% white
A) mutations in the UCSD population B) sexual selection C) gene flow between populations D) a genetic bottleneck E) a founder effect
The nervous system typically
A. is sterile. B. has a small number of normal flora. C. contains Gram-positive bacteria. D. contains a small number of viruses.
Height in tobacco plants is controlled by _____ gene pair(s) while height in peas is controlled by _____ gene(s)
1.one / many
2.one / two
3.two / four or more
4.two or more / one
All of the following are functions of the cell membrane EXCEPT:a
transmitting signals. b. participating in energy transfer. c. being freely permeable to all substances. d. regulating the passage of materials. e. participating in chemical reactions.