Scientific names
a. are always written in all capital letters and in italics.
b. are always written in italics in lower case.
c. are always written in lower case and underlined.
d. are always written in italics with both genus and species capitalized.
e. are always written in italics with only the genus capitalized.
E
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Chapter 43 described an important experiment by Otto Loewi that demonstrated the existence of chemical neurotransmitters. Loewi used frog hearts in dishes that exhibited a regular heartbeat even when disconnected from the rest of the body. This experiment would not have been possible if these hearts lacked
A. sinoatrial nodes. B. atrioventricular nodes. C. neurogenic pacemakers. D. cardiogenic pacemakers. E. atrioventricular valves.
Epigenetic changes that can lead to cancer development involve changes in patterns of
_____________. Fill in the blank(s) with the appropriate word(s).
Why was ?-carotene inserted into GM golden rice?
A) to better synthesize proteins in the body B) to see better under low light conditions C) to more efficiently digest his or her starchy diet D) to better synthesize vitamin A in the body
Which statement applies to artificial selection, but not natural selection?
A. Organisms are capable of producing more offspring than typically will survive. B. The phenotypic variation of a species can be increased very rapidly. C. Phenotypic variation can influence reproductive success. D. Phenotypic variation exists within populations. E. Phenotypic variation within a species is due in part to inherited characteristics.