V-class proton pumps cannot acidify the lumen of an organelle because these pumps are electrogenic.

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#Id: 7248

#Unit 5. Developmental Biology

T2 cells also express BAFF-R, the receptor for the B-cell survival factor BAFF, whose expression is dependent on signals received through the BCR. 

As B cells differentiate from the transitional T2 state to full maturity, they raise their levels of mIgD still further, while reducing the expression of mIgM. They also cease to express CD24 and CD93.

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#Id: 3051

#Unit 10. Ecological Principles

The rate of extinction is low at the time of first colonization and immigration rate is highest

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#Id: 8418

#Unit 10. Ecological Principles

Survivorship curves generated from static life tables may be easier to construct but they ignore environmental variation and may be slightly less accurate than survivorship curves from cohort life tables.

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#Id: 1260

#Unit 7. System Physiology – Animal

The cells of the adrenal cortex contain large amounts of smooth endoplasmic reticulum, which is involved in the steroid-forming process.

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#Id: 9936

#Unit 4. Cell Communication and Cell Signaling

Extracellular Bacteria