Fick's law of diffusion states that the rate of diffusion of a gas across a membrane depends on all of the following except
A. the size of the gas molecule.
B. which membrane transport proteins are present.
C. the width of the membrane.
D. the concentration difference of the gas on the two sides of the membrane.
E. the membrane surface area.
B. which membrane transport proteins are present.
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Almost all cases of cystic fibrosis, a(n) ____ genetic disorder, are the result of mating between two unaffected parents
a. mitochondrial b. autosomal dominant c. autosomal recessive d. X-linked dominant e. X-linked recessive
One characteristic that makes Caenorhabditis elegans attractive for developmental studies is:
a. its small, transparent body. b. the extensive number of genes shared with humans. c. the developmental defects that occur in this organism. d. the close evolutionary relationship between this mammal and humans. e. the presence of zygotic segmentation genes, similar to those found in humans.
Which of the following is NOT found in the nucleus?
A. mitochondria B. nucleolus C. chromatin D. DNA
Which animal is likely to have the circulatory pattern shown in the figure?
A. Mammal B. Fish C. Frog D. Bird E. Crocodile