Prokaryotes split into two lines early in the history of life. The differences are so fundamental that they are assigned to two different domains, the ________ and the Bacteria.
Fill in the blank(s) with the appropriate word(s).
Archaea
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Which of the following statements is true regarding the anterior pituitary gland? Select all correct choices
A. It houses neurosecretory cell axons B. It is derived from neural tissue C. It is the target of releasing factors D. It is derived from epithelial tissue E. It produces tropic hormones
You are a doctor are examining a patient whose thymus never developed because of DiGeorge syndrome
You know that this medical condition is usually due to the deletion of a section of chromosome #22 and that a single copy of shortened chromosome causes the syndrome. The patient's parents are both phenotypically normal with normal thymuses. This suggests that _____________. A. both parents are heterozygous B. both parents are homozygous recessive C. the individual inherited the trait from his grandparents. D. the deletion occurred during gamete formation and thus was not part of the parents' genome.
Which of the following pairs of names is NOT a match?
A. Piciformes/woodpeckers B. Falconiformes/eagles, hawks, vultures C. Passeriformes/robins, starlings, sparrows/warblers, etc. D. Anseriformes/ducks, geese/swans E. Galliformes/owls
A strain that can grow in a minimal medium containing arginine, but NOT in minimal media containing citrulline nor in minimal media containing ornithine would have a mutation in the gene that encodes for _____.
Wild type bread mold can grow in a minimal medium without supplements, while certain mutated strains can only grow in a minimal medium that is supplemented with specific intermediates. See the figure below for an overview of the arginine biosynthetic pathway.
A. enzyme 1.
B. enzyme 2.
C. enzyme 3.
D. both enzymes 1 and 3.
E. both enzymes 2 and 3.