The scientist(s) who showed that DNA contained equal amounts of cytosine and guanine, and equal amounts of adenine and thymine was/were
A. Avery and Macleod.
B. Hershey and Chase.
C. Chargaff.
D. Griffith.
E. Wilkins and Franklin.
C. Chargaff.
Biology & Microbiology
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The cellular organelle responsible for the digestion of ingested infectious agents is the
A. endoplasmic reticulum. B. Golgi apparatus. C. phagolysosome. D. lysosome.
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Will our modern forests eventually become coal? What will be an ideal response?
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Which is the dominant structure during the life cycle of a fern?
1.gametophyte
2.sporophyte
3.archegonium
4.sporangium
When calcium levels rise, the ____ secrete(s)
____, which ____ osteoclast activity. a. parathyroids; calcitonin; suppresses b. thyroid; calcitonin; suppresses c. thyroid; calcitonin; enhances d. thyroid; PTH; suppresses e. parathyroids; PTH; enhances
Biology & Microbiology