Which of the following statements is NOT
correct about osmosis and plant cells?
a. Water tends to diffuse from soil into young
plant cells, thus creating an osmotic
pressure.
b. Turgor pushes against the cell walls from
the outside, so it keeps the cells plump.
c. If the concentration of solutes becomes
higher in the soil than in plant cells, water
molecules will tend to diffuse out of plant
cells.
d. The cytoplasm of plant cells would
typically contain more solutes than soil
water.
e. Osmosis is the diffusion of water molecules
across the plasma membrane of plant cells.
B
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common photosynthetic pigment in plants?
a. chlorophyll a b. chlorophyll b c. chlorophyll c d. chlorophyll d e. chlorophyll e
Which of the following is the first stage in animal development?
A. Cleavage B. Gamete formation C. Gastrula formation D. Zygote formation E. Blastula formation
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How do temporal and spatial summation improve the processing power of the brain?
A. Temporal and spatial summation both make the neuron more likely to fire action potentials. B. Temporal summation allows circadian rhythms to regulate neuronal activity. Spatial summation allows latitude to regulate neuronal activity. C. Temporal summation allows a neuron to fire prolonged action potentials, and spatial summation allows a neuron to synapse onto new targets. 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.