Which of the following would support the statement that bacteria represent the most fundamentally diverse group on Earth?
A) Bacteria exist in varieties with and without cell walls.
B) Bacteria come in several different shapes.
C) Bacteria accomplish all characteristics of life as small, single cells.
D) Bacteria are metabolically diverse regarding oxygen and food requirements.
Answer: D
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Which one of the following features of plant cells is NOT common with animal cells?
A. membranes B. turgor pressure C. plasma membrane D. membrane channels E. active transport
What kind of bond is found between the individual atoms of a single water molecule?
A) hydrogen bonds B) ionic bonds C) covalent bonds that are not polar D) covalent bonds that are polar
Are there ways to prevent cancer?
A) No, cancer cannot be prevented; it can only be treated. B) No, cancer cannot be prevented or treated. C) Yes, there are many ways cancer can be prevented, including through a healthy diet and exercise. D) Yes, cancer can be prevented, but only with intense exercise.
Who proposed that in any DNA molecule, A = T and G = C?
A. Franklin B. Watson and Crick C. Hershey and Chase D. Chargaff