Describe the distinguishing organisms and major biological events associated with the following
geological time units.
A. Precambrian time
B. Paleozoic era
C. Mesozoic era
D. Cenozoic era What will be an ideal response?
Concepts to Consider: Precambrian--bacteria, protists, fungi and simple multicellular animals.
Paleozoic era--all major groups of plants (except angiosperms) and all animal phyla appeared; also
associated with the largest extinction event. Mesozoic--diversification of reptiles, including dinosaurs,
and the appearance of flowering plants, insects, birds, and early mammals; a major extinction event,
probably due to a meteor impact, resulted in a massive extinction at the end of this era. Cenozoic era--
continued diversification of flowering plants, birds, insects, and mammals.
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In cladograms, sister groups are _____
a. inbred b. the same age c. represented by nodes d. in the same family
Science is subdivided into specific areas of study termed disciplines. These divisions are artificial but are helpful to narrow the massive scope of scientific knowledge to a manageable amount. Given what you know about each, which scientific division is likely to present the best answer to a question about how fluid dynamics affect blood pressure in mammals?
A. Bioinformatics - use of technology to study and store biological data B. Biochemistry - study of chemical reactions needed for life function, usually at the cellular level. C. Biophysics - study of biological processes through physics D. Biology - study of life
Which of the following techniques amplifies a specific region of DNA?
A) Gel electrophoresis B) DNA profiles C) PCR D) The use of DNA probes
Which of the following causes food poisoning?
A) Escherichia coli B) Bacillus anthracis C) Vibrio cholerae D) Thiomargarita namibiensis