Which of the following approaches is not used to create a transgenic animal?
A) Sperm-mediated DNA transfer
B) Pronuclear microinjection
C) Transfection of ES cells
D) Retrovirus-mediated transgenesis
E) Embryo twinning
E
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Polyploidy can be described as ____
a. only occurring artificially
b. only occurring when there is one set of chromosomes c. fatal to all living things d. occurring in about 20% of flowering plants e. fatal in humans but common in flowering plants
____ is a systemic infection associated with microorganisms multiplying in circulating blood
Fill in the blank(s) with the appropriate word(s).
Some methanogenic Archaea are capable of fixing nitrogen.
Answer the following statement true (T) or false (F)
Which of the following immunoglobulins is produced by plasma cells in response to an allergen?
A) IgA B) IgD C) IgE D) IgG E) IgM