Tissue cells are connected to the extracellular matrix by receptors that bind to an adhesive protein called
a. fibronectin.
b. aggrecan.
c. integrin.
d. lamin.
Ans: a. fibronectin.
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In many marine systems, the carbon and oxygen cycles are directly proportional to each other
Indicate whether the statement is true or false.
The propagation cycle that occurs in acid mine drainage is caused by
A) reduction of Fe3+ by sulfuric acid. B) the oxidation of sulfide to sulfuric acid by microbial oxidation of iron (Fe3+). C) microbial sulfate reduction. D) low pH and high oxygen concentrations.
Genetic similarities between humans and laboratory animal models facilitate research on the cause, diagnosis, and treatment of human genetic disease
a. True b. False Indicate whether the statement is true or false
In poultry, the genes for rose comb (R) and pea comb
(P) produce walnut whenever they occur together (R__ P__); single-combed individuals have the homozygous condition for both genes (rr pp). (a) Give the F1 and F2 phenotypic results of a cross of a pure-breeding rose comb (RR pp) with a pure-breeding pea comb (rr PP). (b) Give the phenotypic results of a cross of Rr Pp x rr Pp. (c) Give the phenotypic results of a cross of RR Pp x rr Pp. (d) Give the phenotypic results of a cross of Rr pp x rr Pp. (e) Give the phenotypic results of a cross of Rr Pp x rr pp. What will be an ideal response?