Which of these transposable elements do not carry genes for functions other than those needed for transposition?
A. Retrotransposons
B. Conjugal transposons
C. Composite transposons
D. Insertion sequences
Answer: D
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The genetic material (DNA) of eukaryotes is organized into
(a) centrioles. (b) spindles. (c) chromosomes. (d) microtubules.
Which vessel type regulates the amount of blood a particular area receives?
a. arteries b. arterioles c. capillaries d. venules e. veins
All of the following characteristics are necessary for a structure to be classified as a primitive cell except
A. a boundary separating the cell from its watery surroundings. B. DNA. C. an ability to obtain energy from its surroundings. D. macromolecules.
Glycoproteins in the plasma membrane that identify self and help the body defend itself against pathogens.
What will be an ideal response?