What is a leaf blade attached to a stem by a stalk-like structure?
A) internode
B) stoma
C) petiole
D) node
C
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The production of second messengers in signal transduction offers at least two advantages, speed and
A. specificity. B. amplification. C. one-to-one stoichiometry. D. reversibility. E. affinity.
Cataracts occur when the lens becomes opaque. Which symptoms most likely would be present in a patient with this
condition?
a. increased intraocular pressure b. enlarged pupil c. eye pain d. blurred vision e. headache
Distinguish between manipulative experiments and natural experiments
What will be an ideal response?
Eutrophication is
a. the enrichment of a body of water with nutrients. b. the acidification of a body of water with leaves of a hardwood tree. c. the turning of water during winter months in lakes. d. the algal production of toxins to kill fish. e. none of these.