In nonvascular plants, sperm are formed in the archegonia by meiosis
Indicate whether the statement is true or false
FALSE
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Warm, still water holds __________oxygen than cold
Fill in the blank(s) with correct word
Synaptic integration means that
a. positive or excitatory stimuli produce an excitatory postsynaptic potential. b. the positive and negative ions neutralize each other. c. excitatory and inhibitory signals are summed in a receiving neuron. d. the adjacent neurons interact so that excitatory and inhibitory stimuli cancel each other out. e. all of these occur.
What is the cardiac cycle?
A) The movement of blood from the heart to the lungs and then back to the heart B) The movement of blood from systemic to pulmonary circulation C) The passage of electrical impulses from the AV node to the SN node to heart muscle D) The alternating relaxation and contraction of the heart chambers
Bulk flow in the phloem tissue is mostly downward whereas bulk flow in xylem is mostly
A. upward. B. sideways. C. also downward. D. very little bulk flow occurs in xylem. E. flow of sugars.