ISAT Practice #21: Glencoe Science: Life Science: Question Preview (ID: 28661)


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Treating genetic disorders by inserting normal alleles into cells is called ___.
a) Medelian genetics b) gene therapy c) polygenic inheritance d) pedigree analysis
Recombinant DNA is made by ___.
a) exposing DNA to X rays or radioactive substances b) causing random mutations to occur during the copying of DNA c) inserting a segment of DNA from one organism into a chromosome of another organism d) crossing two organisms that are homozygous for a specific trait
A chromosome disorder occurs when ___.
a) one nitrogen base has been substituted for another b) a new organism receives more or fewer chromosomes than normal c) meiosis fails to occur d) DNA is not copied correctly during mitosis
A group of organisms that share similar charcteristics and can reproduce among themselves to produce fertile offspring is called a ___.
a) generation b) species c) hominid d) population
Which of the following is a principle of natural selection?
a) Most organisms are infertile or produce nonvialble offspring. b) Members of a species are genetically identical. c) Variations are acquired during an individual's lifetime and so are not passed to offspring. d) Helpful variations allow individuals to survive and reproduce better than members who lack these variations.
Humans, monkeys, and apes belong to a group of animals known as ___.
a) australopithecenes b) hominids c) primates d) neanderthals
Which of the following is NOT a characteristic of primates?
a) binocular vision b) walking upright c) flexible shoulders d) opposable thumbs
The scientific name for modern humans is ___.
a) Homo sapiens sapiens b) Australopithecus c) Homo habilis d) Homo erectus
Which of the following is based on teh idea that younger rock layers are deposited on top of older rock layers?
a) relative dating b) gradualism c) natural selection d) radiometric dating
What function does a thick, gelatinlike capsule serve in a bacterium?
a) It protects the bacterium from other cells that try to destroy it. b) It allows the bacterium to exchange genetic material with other bacteria. c) It encloses the bacterium's genetic material. d) It enables a bacterium to exist for many years until growth is favorable.
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