When a large portion of a population is wiped out and the genetic base is rebuilt from a small group of individuals, then the __________, a type of genetic drift, may result
Fill in the blank with correct word
Answer:
founder effect
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Which of the following are found in the structure labeled "3"?
A) actin B) myosin C) titin D) tropomyosin E) All of the answers are correct.
Which of the following pairs of terms is mismatched?
A. Cilia - basal bodies B. Golgi apparatus - cisternae C. Lysosomes - hydrolytic enzymes D. Mitochondria - cristae E. Smooth endoplasmic reticulum - chromatin
After a stroke, a patient complains about lack of sensitivity in her right hand. The stroke most likely affected which part of the brain?
A. Precentral gyrus in the left frontal lobe B. Postcentral gyrus in the right temporal lobe C. Postcentral gyrus in the left parietal lobe D. Precentral gyrus in the right frontal lobe E. Postcentral gyrus in the left frontal lobe
Contraction of the cremaster and dartos muscles
A. causes the epididymis to shrink. B. increases during exercise. C. pull the testes closer to the body. D. is responsible for ejaculation. E. causes the penis to become erect.