Protist locomotion is accomplished by the contraction of muscle fibers.
Answer the following statement true (T) or false (F)
False
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All of the following statements about initiation and transmission of action potentials in neurons are correct EXCEPT:
A. The rate of transmission of an action potential is directly related to the diameter of the axon. B. Information about the intensity of a stimulus is conveyed by changes in the size of the action potential generated. C. The resting potential is maintained by differential ion permeabilities and the sodium-potassium pump. D. Once initiated, local depolarizations stimulate a moving wave of depolarization down the axon. E. A stimulus to the neuron can either depolarize or hyperpolarize the neuronal membrane.
The scientists use a virus to insert the new DNA into the cabbage plant’s DNA. The insect
pests would be considered __________.
a. primary producers b. primary consumers c. secondary consumers d. tertiary consumers
The p300/CBP (CREB-binding protein) proteins are histone acetyltransferases that help regulate the transcription of many genes. Based on this information you can conclude that these proteins
A. recruit helicases. B. physically connect activator proteins. C. remodel chromatin. D. acetylate purines.
Regarding megafaunal extinctions, it is assumed that the driving factor was
A. climate change. B. rising sea levels. C. a meteorite. D. the Ice Age. E. Homo sapiens.