Which of the following statements about mutations is TRUE?
A) Mutations are almost always better for the organism.
B) Mutations are caused by natural selection.
C) Mutations have no effect on the survival and reproduction of an organism.
D) Mutations occur at random and are by chance.
E) Mutations almost always leave the organism worse off than before.
D
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The origins of which of the following cell types creates the least amount of ethical debate?
A. EG cells B. EC cells C. Hematopoietic stem cells D. ES cells
What is the principal driving force for movement of water into and through the plant shoot?
a. upward pressure as sugar is forced into the roots b. pumping by the xylem cells c. passive transport d. transpirational pull
Type A influenza virus genome is segmented; single stranded;RNA
a. true b. false
Which of the following is thought to be the major promoter of fatty plaque buildup in the coronary arteries?
What will be an ideal response?