__________ refers to processes designed to induce immunity. Fill in the blank(s) with the appropriate word(s)
ANSWER: Immunization
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Answer the following statements true (T) or false (F)
1.Cells that produce fine fibers of collagen in cartilage are osteocytes. 2.Damage to the myelin sheath of a neuron may slow or even stop nerve impulse transmission. 3.Cancer is a disease that affects the cell cycle. 4.Homeostasis is the state of internal constancy maintained by living organisms. 5.Positive feedback is the most common way that living organisms maintain homeostasis.
Which of the following statements is true?
a. Presently, extinctions are occurring at a very slow pace. b. Mutations, both contemporary and prehistoric, have been the single greatest cause of extinctions. c. The fossil record indicates that there has been very little animal extinction until recently. d. Evolutionary history is often represented by extinctions. e. Organisms compete for limited resources in all environments, possibly leading to extinctions of some.
A bacterium that thrives in the Great Salt Lake but not in fresh water is probably a ________.
Fill in the blank(s) with the appropriate word(s).
In flowering plants, the mature male gametophyte is produced
A. within the ovule just prior to fertilization. B. in the anther. C. within the pollen granule during transfer. D. when the pollen makes contact with the stigma. E. in the pollen tube when the generative cell divides.