Competent cells
A. are able to take up naked DNA.
B. are antibiotic resistant.
C. occur naturally.
D. can be created in the laboratory.
E.
are able to take up naked DNA, occur naturally, AND can be created in the laboratory.
E
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The developing embryo of reptiles, birds, and mammals is encased in the fluid-filled ________ membrane.
A. amniotic B. embryonic C. chorionic D. yolk sac E. allantois
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a. eye structure that focuses an image in front of the retina b. eye structure that focuses an image behind the retina c. eyeball that is too short d. recessive trait on the Y chromosome e. recessive trait on the X chromosome
Distinguish between diurnal, nocturnal, and crepuscular animals, and provide an example of each. What will be an ideal response?