McDonald's is the world's largest purchaser of beef, pork and potatoes
Indicate whether this statement is true or false.
TRUE
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Which structure carries sperm into the prostate gland?
a. urethra b. vas deferens c. ejaculatory duct d. testes e. scrotum
The oldest known megafossils of early vascular plants may be characterized as:
a. possessing dichotomously branched stems with leaves. b. possessing dichotomously branched stems without leaves or roots. c. possessing erect stems with megaphylls. d. possessing roots but lacking sporangia. e. lacking roots but possessing megaphylls.
A restriction fragment is generated by the action of a restriction enzyme (endonuclease)
Indicate whether the statement is true or false
When a region of DNA must be repaired by removing and replacing some of the nucleotides, what ensures that the new nucleotides are in the correct sequence?
A) DNA cannot be repaired and this explains why mutations occur. B) Specific enzymes bind the correct nucleotides. C) The new nucleotides base-pair accurately with those on the complementary strand. D) The repair enzyme recognizes the removed nucleotide and brings in an identical one to replace it. E) The three-dimensional structure determines the order of nucleotides.