Most species of Gram-positive bacteria are ____.
A. photoautotrophic
B. photoheterotrophic
C. chemoautotrophic
D. chemoheterotrophic
E. photochemoautotrophic
Answer: D
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A survivorship curve in which most individuals die late in life is a type _______ curve.
A. IV B. III C. II D. I E. 0I
For the hierarchy of skeletal muscle organization, which accurately lists the order of structures from "small" to "big"?
A. sarcomere, myofibril, muscle fiber, motor unit B. myofibril, muscle fiber, sarcomere, motor unit C. motor unit, myofibril, muscle fiber, sarcomere D. motor unit, sarcomere, muscle fiber, myofibril E. None of the choices are correct.
The structure of DNA was determined primarily by
a. Mendel. b. Watson and Crick. c. Pauling. d. Hershey and Chase. e. Griffith.
At the milestone that defines metaphase, the chromosomes
a. separate. b. come together. c. are at opposite poles. d. line up at the equatorial plate. e. cross over.