Vertebrae are differentiated during embryonic development by the
A) amount of spongy bone present.
B) length of the backbone.
C) degree of structural support needed.
D) pattern of homeotic gene expression.
Answer: D
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Magnification is achieved in a compound microscope through the initial magnification of the specimen by the ________ lens. This image is then projected to the ________ lens that will further magnify the specimen to form a virtual image received by the eye.
A. ocular; objective B. objective; ocular C. scanning; objective D. ocular; oil immersion
Competition between beneficial microbes and potential pathogens is called microbial (antagonisms/synergy/toxicity).
Fill in the blank(s) with the appropriate word(s).
Transformation of bacteria was shown to occur when ________ bacteria were injected into mice and the mice ________.
A. live S strain; died B. live S and R strain; died C. live R strain and dead S strain; died D. live S strain and dead R strain; didn't die E. live R strain; didn't die
GMO crops such as ____ help farmers use smaller amounts of toxic pesticides because these crops are pest resistant
a. glyphosphate b. Golden Rice c. A. tumefaciens corn d. Ti corn and rice e. Bt corn and soy