All of the following are sources of variation in the inherited traits of a population except:
a. UV radiation
b. crossing over
c. independent assortment
d. sexual reproduction
e. mitosis
What will be an ideal response?
mitosis
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What helical forms are adopted by double-stranded RNA?
A. There is evidence for B-form RNA in viruses. B. There is no evidence that A-form RNA occurs in cells. C. The A form is the only form found for double-stranded RNA in cells and in viruses. D. There is evidence that Z-form RNA occurs in cells under certain conditions. E. The A form occurs only in the laboratory.
Rank the following steps in the correct order to describe the process of seamless cloning.1. DNA to be inserted is amplified by PCR and contains 5' sequences that match the vector's junction site2. Vector is linearized and mixed with the amplified DNA3. T5 exonuclease cleaves the 5' ends of all fragments leaving 3' sticky ends4. The vector and amplified DNA hybridize at their complementary 3' sticky ends5. DNA polymerase extends the 3' ends of the vector and inserted DNA strands6. DNA ligase seals the gaps between vector and insert to close the recombinant circular molecule
Fill in the blank(s) with the appropriate word(s).
Organisms that are not drastically affected by increased pressure are called ________.
A. barophilic B. barotolerant C. osmophilic D. osmotolerant
A ________ is a device used for growing mass cultures.
Fill in the blank(s) with the appropriate word(s).