The mitochondria is the shipping center of the company regarding the cell.
a. true
b. false
b. false
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A bone marrow aspirate is examined for the presence of parasites from a patient who has been traveling in Latin America for several months and who came in contact with a triatomid bug. Which parasite will most likely be identified?
a. Trypanosoma cruzi b. D. fragilis c. Fasciola hepatica d. Chilomastix mesnili
Capillary action is one of the forces that aids water's upward movement in plants. The narrower the diameter of the tube, the farther the water column will rise. Capillary action is a result of water molecules:
A. producing sufficient surface tension to overcome the pull of gravity. B. having a strong cohesive force and attaching to the surrounding vessel walls. C. storing heat and thus moving faster because of heat of vaporization. D. having an adhesive force, which allows them to attach to the vessel walls. E. being associated with hydrophobic molecules, which can result in upward movement.
Which of the following contains all of the others?
A) biosphere B) community C) ecosystem D) population
Which of the following statements best reflects the nature of synaptic plasticity?
(a) New synapses are created due to the postnatal generation of neurons. (b) Synaptic response changes in magnitude depending on frequency of stimulation. (c) There is a change in the type of neurotransmitter used at the synapse. (d) Neuronal connections are pruned during normal development.