Which of our ancestors was "handy man"?

A. Homo habilis
B. Homo erectus
C. Australopithecus anamensis
D. Australopithecus afarensis


Answer: A

Biology & Microbiology

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Which of the following groups of molecules commonly serve as sources of energy for animals?

A. proteins, lipids, and carbohydrates B. proteins and carbohydrates C. carbohydrates and lipids D. proteins and lipids E. carbohydrates, nucleic acids, and lipids

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Burning of carbon-based fuels can produce which one of the following, an odorless gas that competes with oxygen for binding to hemoglobin.

A) carbon monoxide. B) hydrogen peroxide. C) sulfuric acid. D) methane.

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In Duchenne muscular dystrophy, which

protein is directly affected?

a. myosin b. actin c. dystrophin d. myoglobin e. hemoglobin

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Which is the proper sequence of events in asexual cell division?

a) interphase ; mitosis ; meiosis ; cytokinesis b) interphase ; prophase I ; metaphase I; anaphase I; telophase I; cytokinesis ; prophase II ; metaphase II; anaphase II; telophase II; cytokinesis c) interphase ; prophase ; anaphase ; metaphase ; telophase ; cytokinesis d) interphase ; prophase ; metaphase ; anaphase ; telophase ; cytokinesis e) interphase ; prophase I ; metaphase I; anaphase I; telophase I; prophase II ; metaphase II; anaphase II; telophase II; cytokinesis

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