Why is it important to have a clean slide prior to staining?
What will be an ideal response?
Answer: To make sure that the bacteria on the slide is a pure culture and to make visualization of the bacteria as clear as possible.
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Which of the following features are used to identify chordates?
A. A notochord B. A hollow nerve cord C. A tail during embryonic development D. All of the above are features used to identify chordates.
An embryo impants in the uterus when it reaches the _______ stage of development.
Fill in the blank(s) with the appropriate word(s).
To answer the following questions refer to the four items listed below.
A. This is any DNA made from mRNA transcripts. B. This is a nuclease whose function is to cut apart foreign DNA entering a cell. C. This is from a viral source and catalyzes reactions to construct DNA strands from mRNA. D. This is an enzyme used to produce DNA without introns. E. This is a collection of host cells that house cloned genomic DNA.
Which of the following shows the greatest promise as a cancer chemotherapy agent?
A) a drug that interferes with organismal cellular respiration B) a drug that prevents mitotic spindle from forming C) a drug that prevents crossing over D) a drug that prevents tetrad formation