The longest limb on the Angel Oak on Johns Island, South Carolina, is ____

a. 10 m
b. 17 m
c. 40 m
d. 57 m
e. 75 m


ANSWER: d

Biology & Microbiology

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Several scientists, including Charles and Francis Darwin, Frits Went and others, demonstrated that auxins caused stems to bend toward light in a series of elaborate experiments. Went was the researcher who finally determined that bending of the stem toward light was a result of which mechanism?  

A.  Light caused a reduction in auxin concentration and a reduction in stem elongation on the lighted side of the plant stem, and thus a bending in the direction of the light. B.  The transport of auxin to the shaded side of the plant stem stimulated stem elongation and a bending in the direction of the light. C.  Auxin concentration was equal on both sides (lighted and shaded) of the stem; however, the apical meristem responded to the presence of light. D.  A combination of positive phototropism and a negative gravitropism. E.  The stems actually were responding to the agar blocks that had been used in the experiments.

Biology & Microbiology

The endomembrane system is involved in each of the following functions EXCEPT ____

a. DNA synthesis b. synthesis of proteins c. synthesis of lipids d. transport of proteins to outside the cell e. detoxification of some toxins

Biology & Microbiology

Which embryonic tissue is defective if an embryo

develops into a creature that cannot move and has no supportive or circulatory system? a. ectoderm b. endoderm c. mesoderm d. somatoderm e. all of these

Biology & Microbiology

Homeobox genes determine the overall shape of the body and the location of its parts

Indicate whether the statement is true or false

Biology & Microbiology