Once formed, B cells mature in the _____, while T cells mature in the _____
Fill in the blank(s) with correct word
bone marrow; thymus gland
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________ consume organic molecules to live.
A. Autotrophs B. Plants C. Heterotrophs D. Hemitrophs E. Photoautotrophs
How do plants benefit from a mycorrhizal partnership with a soil fungus?
a. the fungus provides sugars b. the fungus participates in photosynthesis c. they provide digestive enzymes d. they increase the absorptive surface area of the plant and provide water and nutrients e. the protect the plant from pathogens
Which animals are bilateral with a tubular gut, a coelom and conspicuous segmentation, inside and out?
a. sponges b. cnidarians c. flatworms d. annelids e. mollusks
A microbiologist is attempting to determine the size of a microbial population and has employed several methods. She noticed that the direct count she obtained using a counting chamber and microscope was much higher than her estimate from doing a viable plate count. This discrepancy was encountered during multiple trials. What is the most likely reason for the discrepancy?
A. She counted incorrectly. B. The organisms were not readily cultured on the viable count, either because many were dead or because the medium and growth conditions used for the viable count will not support the growth of the microorganism. C. She did not correctly do the serial dilutions prior to the viable plate count. D. Many of the organisms viewed during the direct count may be dead. E. The medium and growth conditions used for the viable count will not support the growth of the organisms.