True or False: The redox reactions of Fe2+ and Fe3+ can EACH be biologically and chemically mediated
a. TRUE
b. FALSE
Answer: A
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You grow two trays of Arabidopsis plants under identical conditions, except that one tray of plants is exposed to a gentle breeze for several hours each day
Compared to plants grown in calm conditions what would you expect to see in the wind-exposed plants? I. changes in the expression of many genes II. taller flower stalks III. shorter flower stalks IV. more flexible cell walls V. no changes in 2nd messengers VI. increases in 2nd messengers and/or phosphorylated proteins VII. increased levels of Pfr VIII. stiffer cell walls. A) I, III, VI, VIII B) II, IV, V, VII C) III, IV, VII D) VI, VII, VIII E) wind has no effect on plant development
Transposable elements in bacteria are commonly called insertion sequences
Indicate whether the statement is true or false
What type of roots do monocot plants often exhibit?
A) no roots at all B) one large taproot C) fibrous, broadly spread roots D) roots that extend deep into the ground
The maximum population density of a given species that a defined geographical area can sustain over time is known as the:
A) carrying capacity. B) ecosystem capacity. C) community capacity. D) maximum yield.