The basic cells used for rapid communication and control are

A. neuroglia
B. neurons
C. chondrocytes
D. blood cells


Ans: B. neurons

Biology & Microbiology

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How can a signal be amplified?

a. Activation of the signal propagation network can cause the signal to collapse and not propagate. b. Signal activation can result in phosphorylation of unrelated receptors and the propagation of different types of signals. c. Activation of a receptor-linked enzyme can activate many copies of the response molecule. d. A cascade of upstream events can result in activation at inappropriate times when the signal is not intended.

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The genetic engineering of human-animal hybrids is a routine procedure related to assisted reproductive technologies

a. True b. False

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Sexual reproduction in protists involves diverse strategies. Which of the following is common to all types of sexual reproduction in protists?

A. Isogamy B. Syngamy C. Conjugation D. Heterogamy E. Anisogamy

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Which of these is an organ of the urinary system?

a. Prostate gland b. uterus, c. rectum, d. kidney

Biology & Microbiology