When a microbe that is not part of the normal biota enters into the body, it is likely to first encounter which type of host defenses in the form of white blood cells called _____
Fill in the blank(s) with the appropriate word(s).
phagocytes
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Which of the following is the gene from which bacteria has been introduced into many plant genomes to confer the ability to produce toxic crystals that kill many insects?
a. Agrobacterium tumefaciens b. E. coli c. Y. pestis d. Bacillus thuringiensis
The prostate:
A. is fairly large at birth but shrinks markedly during puberty. B. secretes a milky alkaline fluid that is part of the ejaculate. C. cannot be felt in a rectal examination. D. is composed entirely of glandular tissue.
Which of the following DNA mutations is the most likely to be damaging to the protein it specifies?
A. a codon substitution B. a codon deletion C. a base-pair deletion D. a substitution in the last base of a codon E. a point mutation
Suppose that during the embryonic development of a hand, homeotic gene expression is altered such that the dorsal-ventral axis is switched. What is the most likely outcome of this scenario?
A) The palm and back of the hand will be switched. B) The pinky and thumb would be switched. C) The shoulder and hand would be switched. D) The foot and hand would be switched.