A nerve is...
What will be an ideal response?
a bundle of neuron extensions wrapped in connective tissue
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DNA replication is a complex and ungoverned process, and, as a result, the frequency of error is quite high.
Answer the following statement true (T) or false (F)
If all of the phloem is stripped from around a tree in
a process known as girdling, a. the plant will stop growing. b. the vascular cambium will be destroyed so that the plant can no longer grow. c. the shoot system will get no moisture or minerals. d. the roots will starve and eventually the plant will die. e. there will be no problems unless the tree becomes infected by insects and fungi.
Which of the following evolution-related events is in the correct cause-and-effect sequence?
a. mutation ? variation ? natural selection ? adaptation ? speciation b. variation ? adaptation ? mutation ? natural selection ? speciation c. speciation ? adaptation ? variation ? mutation ? natural selection d. mutation ? speciation ? adaptation ? variation ? natural selection e. natural selection ? variation ? mutation ? adaptation ? speciation
What causes the large majority of errors in DNA replication?
1.chemical carcinogens 2.the speed of the replication process 3.the complexity of the replication machinery 4.mutations in proofreading and repair genes