During the initiation of nitrogen-fixation nodules, a host plant with genetic mutations releases altered forms of flavonoids. What is the likely consequence of this?
A. Infection threads will grow in the wrong direction.
B. More nodules will form than necessary.
C. Nodules will be misshapen.
D. The bacteria will not produce any Nod factors.
E. The bacterial will produce higher levels of Nod factors.
Answer: D
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In what way do the membranes of a eukaryotic cell vary?
A) Phospholipids are found only in certain membranes. B) Certain proteins are unique to each membrane. C) Only certain membranes of the cell are selectively permeable. D) Only certain membranes are constructed from amphipathic molecules. E) Some membranes have hydrophobic surfaces exposed to the cytoplasm, while others have hydrophilic surfaces facing the cytoplasm.
If the current trend continues, what do you predict the temperature anomaly will be in 2025?
A) 0 B) 0.6 C) -0.5 D) -0.2
A gene may consist of thousands of nucleotides.
a. true b. false
A facultative anaerobe can perform both aerobic and anaerobic respiration?
a. true b. false