All genetic drift arises from sampling error.  There are several different ways in which sampling error can arise as a following

a. Reduced population size      b. Founder effect

c. Genetic bottleneck                d. Differ in sex ratio

Which of the following above way cause sampling error in succeed generation?

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#Question id: 30070

#Unit 7. System Physiology – Animal

Effect of catecholamines on the strength of cardiac contraction is called their:

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#Question id: 12542

#Unit 10. Ecological Principles

Use Figure to answer the following questions. Examine this food web for a particular terrestrial ecosystem. Each letter is a species. The arrows represent energy flow.

Which species is autotrophic?

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#Question id: 1936

#Unit 4. Cell Communication and Cell Signaling

Stimulation of a single B cell would result in the generation of a clone of cells having_____

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#Question id: 4001

#Unit 1. Molecules and their Interaction Relevant to Biology

Which is not true about the lac repressor?

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#Question id: 11008

#Unit 7. System Physiology – Animal

Which of the following events is associated with the first heart sound?