Viral infections in plants _____
A) can be controlled with antibiotics
B) can spread within a plant via plasmodesmata
C) have little effect on plant growth
D) are not spread by animals
B
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Match the terms in the left column to the definitions in the right column. Use each answer only once.
(a) negative geotaxis (b) positive geotaxis (c) negative phototaxis (d) negative thigmotaxis (e) positive thigmotaxis (f) positive phototaxis i. attracted to gravity ii. attracted to light iii. avoidance of touch iv. avoidance of gravity v. attracted to touch vi. avoidance of light
A person with which of the following blood types is a universal donor who can donate blood
to anyone with any other blood type?
a. O b. AB c. A d. B
All of the following are correct statements
about sampling error, except one. Select the exception.
a. Repeating an experiment many times has the same effect on sampling error as working on a large sample. b. A large sample would help minimize sampling error. c. Sampling error is increased when a sample size is small. d. A sampling error results from a mistake made by a researcher during experimentation. e. Sampling error is the difference between results derived from testing an entire group of individuals, and results derived from testing of a subset of the group.
Which of the following pairs is mismatched?
A) NaOH ? Na+ + OH- — base B) HF ? H+ + F- — acid C) MgSO4 ? Mg2+ + SO42- — salt D) KH2PO4 ? K+ + H2PO4- — acid E) H2SO4 ? 2H+ + SO42- — acid