Davis’s U-tube experiment- Exchange of bacterial genes clearly required direct contact in conjugation.

TLS Online TPP Program

#Id: 7585

#Unit 5. Developmental Biology

The influx of bicarbonate ions (and possibly other ions) alkalinizes the sperm, raising its pH. This will be critical in the subsequent activation of calcium channels

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#Id: 8706

#Unit 1. Molecules and their Interaction Relevant to Biology

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#Id: 5734

#Unit 10. Ecological Principles

Competition theory

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#Id: 7339

#Unit 11. Evolution and Behavior

Positive assortative mating

Individuals' mate with others who are like themselves phenotypically for selected traits. The net effect of positive assortative mating is a progressive increase in the number of  homozygous genotypes (AA and aa)

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#Id: 1355

#Unit 4. Cell Communication and Cell Signaling

MEK, a dual-specificity protein kinase