B cells react with antigens through TCR antigen receptors
Indicate whether the statement is true or false.
Answer: FALSE
You might also like to view...
The early cell divisions of human development differ from other mitotic cell divisions in that:
A. cells do not replicate all chromosomes prior to dividing; this helps the cells differentiate. B. cells do not grow in size; they subdivide the cytoplasm of the fertilized egg. C. cells move as they divide. D. they are unequal; some daughter cells are much larger than others. E. All of these choices are correct.
Which sequence of events is required for the brain to interpret sound?
I. Vibration of the basilar membrane relative to the tectorial membrane causes cilia on hair cells to bend and triggers depolarization. II. Hair cells stimulate the production of action potentials in sensory neurons that project to the brain. III. Ganglion cell axons transmit action potentials to the occipital lobe. A. II then I B. III then I then II C. III then I D. I then II E. I then II then III
Countercurrent exchange allows for the removal of ____ percent of O2 from water flowing over gills
a. 50?60 b. 60?70 c. 70?80 d. 80?90 e. 90?100
The most economically useful unicellular fungi are
A. basidiomycetes. B. mushrooms. C. actinomycetes. D. yeasts.