What is the response time for adaptive immunity?

a. 30 minutes
b. 2-3 hours
c. 5-7 days
d. 6-9 months
e. 12-24 hours


c

Biology & Microbiology

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What evidence do paleobotanists look for that indicates the movement of plants from water to land?

A) waxy cuticle to decrease evaporation from leaves B) loss of structures that produce spores C) sporopollenin to inhibit evaporation from leaves D) remnants of chloroplasts from photosynthesizing cells

Biology & Microbiology

The study of DNA sequences indicates that the evolution of new functions for proteins typically occurs ________.

a. after gene duplication b. after genetic drift c. before gene duplication d. during gene flow

Biology & Microbiology

Which molecule, a product of hemoglobin metabolism, does the liver excrete through bile?

a. alcohol b. bilirubin c. cholesterol d. bicarbonate e. urea

Biology & Microbiology

All eubacteria are:

a. multicellular, prokaryotes b. unicellular, prokaryotes c. multicellular, eukaroyotes d. unicellular, eukaryotes

Biology & Microbiology