Which of the following observations about flagella is true and is consistent with the scientific conclusion that the flagella from protists and bacteria evolved independently?
A) The flagella of both protists and bacteria are made of the same protein, but the configuration is different.
B) The mechanics of movement and protein structure are the same in these flagella, but there are significant genetic differences.
C) Although the mechanism of movement in both flagella is the same, the protein that accomplishes the movement is different.
D) The protein structure and the mechanism of movement in protist flagella are different from those of bacteria flagella.
D
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The primary function of the loop of Henle is:
A. to generate a concentration gradient between the inner medulla and outer cortex. B. to dilute the filtrate passing through the loop. C. to concentrate the filtrate passing through the loop. D. selective reabsorption of glucose and other solutes into the bloodstream. E. active secretion of other wastes from the bloodstream.
Antigens displayed on the surface of antigen-presenting cells and viral-infected cells are bound to specific classes of ____________________ molecules
Fill in the blank(s) with correct word
Proteomics is made complicated by the fact that:a
gene therapy is in its infancy. b. DNA sequencing requires powerful computers. c. the response to a drug varies with the individual. d. certain genes encode several different proteins. e. cells of different tissues contain the same kinds of proteins.
A marine fish with a cold body temperature that matches its cold surroundings is an example of
A. regulating. B. conforming. C. conditioning. D. negative feedback.