The above diagram is an example of ____
a. a closed circulatory system with one heart
b. an open circulatory system with one heart
c. a closed circulatory system with a three-chambered heart
d. an open circulatory system with a two-chambered heart
e. a closed circulatory system with a four-chambered heart
ANSWER: a
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Supercoiling of double-stranded DNA is called its ______________ structure
A. primary B. secondary C. tertiary D. quaternary E. duplex
Trace elements dissolved in seawater are present in concentrations less than one part per thousand
Indicate whether the statement is true or false
What could the children of a color-blind
woman and a man with normal vision be?
a. All will be color-blind. b. None will be color-blind. c. Daughters will be color-blind, and sons will be normal. d. Sons will be color-blind, and daughters will be normal. e. About half would be color-blind
The synthesis of ATP from ADP and Pi, when coupled with an exergonic chemical reaction is called ________ phosphorylation.
A. conformational change B. substrate-level C. oxidative D. chemiosmotic