How would you go about streaking a plate for isolation? Why do you heat the loop and when do you do it?
What will be an ideal response?
Ans: Heat loop, streak bacteria onto first quadrant; heat loop, streak from first to second quadrant; heat loop, streak from second to third quadrant, (heat loop if you want) streak from third to fourth quadrant
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Except for tropical tree ferns, the stems of most ferns are underground rhizomes
a. True b. False
Why is the protein-first hypothesis not accepted by most scientists?
a. Proteins cannot be catalysts. b. There is no known mechanism of protein self-replication. c. Of all of the macromolecules, only DNA can self-replicate. d. There is no evidence that proteins can store information. e. Proteins are too complex to have been the first "polymers of life."
The spread of cancer cells from their site of origin to sites distant in the body is called ________.
A. mitosis B. tumor C. metastasis D. growth
Summarize research conducted in order to identify how epigenetic changes might affect the risks of depression and
suicide in certain individuals. Comment on the limitations of this study. What will be an ideal response?