Glucose is absorbed through the membranes of
the small intestine primarily by
a. osmosis.
b. bulk flow.
c. transport proteins.
d. endocytosis.
e. facilitated diffusion
C
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The ________ codon is used as the start codon by nearly all organisms.
A) AUG methionine B) UGA arginine C) AUG cysteine D) UGA methionine
Studying the partial-genome sequences that result from metagenomic analyses of extreme environments allows researchers to ________.
A. infer the metabolic characteristics of the proposed organisms by analyzing their putative proteins B. limit the phyla of archaea by sorting them according to their habitats C. finalize the organization of domain Archaea D. classify them in a specific phylum described in Bergey's Manual
During this stage of mitosis, the chromosomes become attached to the spindle at their kinetochores.
A. Metaphase B. Prophase C. Prometaphase D. Telophase E. Anaphase
In vertebrate evolution, the appearance of the vertebral column led most directly to development of
a. limbs such as arms and legs b. jaws c. sense organs and the nervous system d. more efficient breathing systems e. greater speed of locomotion