Which ONE of the following ultrastructural features is believed to allow for the increased permeability of the vascular endothelium in acutely inflamed tissue?

A. Cytoplasmic micropinocytotic vesicles.

B. Gaps in endothelial tight junctions.

C. Gaps in the basement membrane.

D. Increase in number of phagolysosomes.

E. No morphological changes.

desert perennials often survive by remaining dormant during dry periods of the year, then springing to life when water becomes available. most annual desert plants germinate only after heavy seasonal rain, then complete their reproductive cycle very quickly.

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