Which of the following is NOT a goal of recombinant DNA technology?
A. combining genetic material from more than one organism to produce new useful organisms
B. making it possible to clone humans
C. eliminating undesirable traits from livestock or crops
D. being able to remove or correct damaging traits in humans
E. creating organisms capable of producing useful products
Answer: B
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On a biology field trip near campus you observe layers of volcanic rock, eroded mountain rocks, and even rocks apparently formed near an ocean coast. You notice that fossils found within the different rock layers have diverse body forms as a result of their environment. This set of observations tends to support
A. limits to the fossil organism populations, as proposed by Malthus. B. catastrophism, as proposed by Cuvier. C. uniformitarianism, as proposed by Hutton. D. uniformitarianism, as proposed by Lyell. E. microevolution of the organisms, as the environment changed.
Transgenic animals made by pronuclear injection can be limited for studies of the links between genes and disease because
A) the transgene allele must be dominant to the normal, endogenous allele and some diseases are caused by recessive mutations. B) the transgene allele must be recessive to the normal, endogenous allele and some diseases are caused by dominant mutations. C) all diseases are caused by mutations in multiple genes. D) diseases are not caused by specific alleles of a gene, but by posttranslational modifications of proteins.
The structures labeled "d" in the following figure are called ________.
Fill in the blank(s) with the appropriate word(s).
Bacillus thuringiensis is used
a) to treat sewage. b) in bioremediation. c) as a natural insecticide. d) to recycle vital elements.