The genetic code is essentially the same for all organisms. Based on this information, one can logically assume which of the following statements to be correct?
a. A gene from an organism can theoretically be expressed by any other organism.
b. All organisms have experienced convergent evolution.
c. The same codons in different organisms translate into the different amino acids.
d. DNA was the first genetic material.
e. Different organisms have different numbers of different types of amino acids.
Answer: a. A gene from an organism can theoretically be expressed by any other organism.
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The fossil record is incomplete because
a. very few organisms were preserved as fossils. b. organisms tend to decay before becoming a fossil. c. animals with hard parts are preserved more easily. d. geologic processes may destroy fossils. e. all of these are true.
Which organisms obtain energy by oxidizing organic or inorganic substances?
a. auxotrophs b. autotrophs c. chemotrophs d. phototrophs
Which statement is FALSE regarding science?
(a). Science helps us to understand the natural world. (b). Science strives to be objective rather than subjective. (c). Correct scientific conclusions are permanent and never subject to change or refinement. (d). Information is gathered by scientific methods. (e). Information is gathered by scientific methods.
According to the fluid mosaic model of cell membranes, which of the following is true regarding
membrane phospholipids?
a. They are anchored in place by intermediate filaments. b. They can move laterally along the plane of the membrane. c. They have hydrophilic tails in the interior of the membrane. d. They occur in an uninterrupted bilayer, with membrane proteins bound only to the surface of the membrane. e. They are free to leave the membrane and dissolve in the interstitial fluid.