All of the following are part of a prokaryotic cell except
a. DNA.
b. a cell wall.
c. a plasma membrane.
d. ribosomes.
e. an endoplasmic reticulum.
e. an endoplasmic reticulum.
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Which of the following lines of evidence would best support your assertion that a particular plant is an angiosperm?
A) It produces seeds. B) It retains its fertilized egg within its archaegonium. C) It lacks gametangia. D) It undergoes alternation of generations. E) It produces gametes by mitosis rather than meiosis.
Duchenne muscular dystrophy is caused by
a. a mutation that weakens the cytoskeleton of the muscle fiber. b. a mutation that weakens myofibrils. c. a mutation in the X and Y chromosome. d. a mutation that disrupts the sarcomere. e. a mutation that increases the transmission of force.
Which of the following is a function of pasteurization?
A. Reducing the total microbial population B. Increasing the shelf life of the product C. Killing pathogenic microorganisms D. All of the choices are correct.
Evolution by natural selection is
A) a process that has occurred only in the past. B) currently occurring but only in scientific laboratories. C) constantly occurring at the same rate in all organisms. D) a rare event that has never been observed by scientists. E) a process that occurs as a result of differences in fitness.