The developmental precursors to the gonadal tissues of Caenorhabditis elegans uniquely contain _____
A) proteins of maternal origin
B) high concentrations of potassium ions
C) T tubules for the propagation of action potentials
D) P granules of mRNA and protein
D
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How do temporal and spatial summation improve the processing power of the brain?
A. Temporal summation allows circadian rhythms to regulate neuronal activity. Spatial summation allows latitude to regulate neuronal activity. B. Temporal summation allows a neuron to fire prolonged action potentials, and spatial summation allows a neuron to synapse onto new targets. C. Temporal and spatial summation both make the neuron more likely to fire action potentials. D. Temporal summation allows a neuron to recognize a persistent signal from a single presynaptic cell, and spatial summation allows a neuron to recognize a broad signal from multiple presynaptic cells. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content/Choose Answer · What do you already know about summation? What other information is related to the question? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
All cells contain
a. cytoplasm. b. a cell wall, nucleus, and cytoplasm. c. DNA, plasma membrane, and cytoplasm. d. mitochondria, plasma membrane, and cytoplasm.
Carbon enters the atmosphere through all of the following sources EXCEPT ____
a. cell respiration
b. volcanic eruptions c. burning of fossil fuels d. wind erosion e. fire
Mollicutes, such as Mycoplasma species, are able to colonize mucous membranes and can lead to pneumonia and respiratory tract disease.
Answer the following statement true (T) or false (F)