What motor proteins are responsible for the activity of the contractile ring during cytokinesis in animal cells?
A. kinesin
B. myosin
C. dynein
D. dynamin
B
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A DNA microarray contains oligonucleotides that contain a label
Indicate whether this statement is true or false.
The genomes of closely related species are more similar than distantly related species because _____
a. the less time since the species diverged, the more lethal DNA mutations will accumulate b. the more time since the species diverged, the more neutral DNA mutations will accumulate c. the less time since the species diverged, the more neutral DNA mutations will accumulate d. the more time since the species converged, the fewer adaptive DNA mutations will accumulate e. all organisms will accumulate lethal DNA mutations at the same rate
The most accurate description of SPATIAL summation is
A. Several inputs from DIFFERENT presynaptic cells create EPSPs that sum together to bring the neuron over the threshold for an action potential. B. Several inputs from the SAME presynaptic cell arrive in rapid succession, summing into a larger depolarization that brings the neuron over the threshold for an action potential.
Oooof! You are so full! The holiday dinner you just ate has expanded your stomach beyond its usual capacity. Which type of receptor tells you so?
a. muscle spindles b. Golgi tendon organs c. gastric stretch receptors d. Merkel’s disks