If this was an ecosystem-level study, what additional data might Paine need to collect?
a. predation
b. communication and social groups
c. parasites
d. light levels
D
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Each nucleotide contains
1.a five carbon sugar. 2.an amino group. 3.a sulfur atom. 4.a phosphate group. 5.both a five carbon sugar and a phosphate group.
Which of the following is an incorrect match?
a. pea pods; dehiscent b. strawberry; berry c. cherry; drupe d. corn; indehiscent e. tomato; berry
Match the motor molecule to its function
A) processive movement toward microtubule plus end B) movement along microtubule toward its minus end C) processive movement toward actin filament plus end D) generates force on actin filaments in a sarcomere E) generates force for sliding of flagellar microtubules 1) cytoplasmic dynein 2) axonemal dynein 3) kinesin 4) myosin V dimer 5) myosin II filament
When legumes with nitrogen-fixation nodules are given chemical fertilizers with high nitrogen concentrations, they abandon support of the nodules and end the symbiosis. Why?
A. The mineral nutrients inhibit nitrogenase activity. B. The plant can conserve valuable energy sources by terminating the symbiotic relationship. C. Nitrogen gas is no longer available in the soil. D. The dissolved chemical nutrients are toxic to Rhizobium bacteria. E. Dissolved nitrogen uncurls the root hairs, releasing the nodule.