Which of the following statements is true regarding cloning techniques?
A. Embryo splitting results in offspring that are genetically identical to their parents.
B. Reproductive cloning always involves the transfer of an animal’s nucleus from a body cell to an egg cell.
C. Early clones such as Dolly were smaller and acted differently from normal sheep.
D. Somatic cell nuclear transfer results in offspring that are genetically identical to their parent.
E. Clones can only be made from cells of live, fertile animals.
Answer: D
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a. primary b. secondary c. tertiary d. initial e. mutable
The amniotic egg evolved as an adaptation
A. against predation. B. to insure survival in the uterus. C. to prevent desiccation. D. to permit the embryo to develop undisturbed up to the time of hatching.
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What is a ribosome made of?
a. tRNA and rRNA b. tRNA, rRNA, and mRNA c. rRNA and proteins d. rRNA and mRNA