The information carried by a DNA molecule is in _________.
A. its amino acid sequence
B. the total number of nucleotides it contains
C. the order of the nucleotides in the molecule
D. the sugars and phosphates forming its backbone
C. the order of the nucleotides in the molecule
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Fossil evidence places the origin of angiosperms in the early Cretaceous period, at least 130 million years ago. By 100 million years ago, all of today's major lineages of angiosperms were in place. Angiosperms make up 95% of all modern plant species. Which of the following may help explain the rapid success of angiosperms?
a. Use of the wind to disperse pollen and seeds b. Flowers and fruits help protect and disperse both pollen and seeds c. Use of the wind to disperse spores d. Use of water to disperse pollen and seeds e. Animals eating the plants helped to disperse both pollen and seeds
What does the glucose molecule supply to cells?
What will be an ideal response?
When a usable organic electron donor is present, sulfate serves as a terminal electron acceptor during anaerobic respiration by ________.
A. Archaeoglobus B. Desulfonema C. Desulfovibrio D. All of the choices are correct.
Which of the following could be used to sterilize plastic pipettes in plastic wrappers?
A. autoclaves B. incineration C. ionizing radiation D. ultraviolet radiation