Which of the following species, all of which are involved in step 2 of the citric acid cycle, is optically active?

A) cis-aconitate
B) citrate
C) isocitrate
D) none of them


C

Environmental & Atmospheric Sciences

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At Hebgen Lake in 1959 an earthquake larger than magnitude 7 greatly affected ________.

A. Yellowstone National Park B. Denali National Park C. Grand Canyon National Park D. Yosemite National Park E. Olympia National Park

Environmental & Atmospheric Sciences

Planetary scientists have successfully explored Mars using

A. landed rovers. B. orbiting spacecraft. C. sophisticated cameras. D. All of these choices are correct.

Environmental & Atmospheric Sciences

Science

a. is a study of the history of the natural world b. attempts to discover order in nature to interpret the past c. is best described as a random collection of facts d. is supported by small amounts of evidence e. is an endeavor to discover how nature works

Environmental & Atmospheric Sciences

The earth's biodiversity is determined by the balance between ____.

A. geographic isolation and reproductive isolation B. speciation and extinction C. mass extinction and background extinction D. speciation and genetic engineering E. reproductive isolation and extinction

Environmental & Atmospheric Sciences