Plants that reproduce asexually might produce identical progeny from all of the following except
A. portions of roots
B. portions of stem
C. portions of leaves
D. pollen grains
Ans: D. pollen grains
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DNA replication of a single DNA molecule is referred to as semiconservative because
a. it results in two nonidentical DNA molecules. b. one DNA strand is replicated continuously, while the other must be replicated discontinuously. c. of the two DNA molecules, one is made up totally of parental DNA, while the other is entirely newly synthesized DNA. d. all the DNA strands in the two DNA molecules will have both parental and newly synthesized DNA. e. each of the two DNA molecules will consist of one parental strand and one newly synthesized strand.
How many days after fertilization does the zygote become a ball of cells?
a. five days b. four days c. one to two days d. six to eight days e. it depends on the age of the mother
A protein that regulates transcription by binding to the operator is known as the
A. repressor. B. CAP. C. operator. D. operon. E. promoter.
What is the method of having results evaluated by other experts in the field called?
a) peer review b) inductive method c) scientific method.