A vascular cylinder consists of cells of the _____

a. exodermis d. xylem and phloem
b. endodermis e. endodermis, xylem and phloem
c. root cortex f. all of these


E

Biology & Microbiology

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From which chamber of the heart does the right ventricle receive blood?

a. right atrium. b. left atrium. c. left ventricle. d. none of the above.

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During a controlled experiment, a scientist isolates and tests

A) a control group. B) a conclusion. C) a single variable. D) a mass of information.

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__________ is a field of study concerned with the origins, evolution, and persistence of life on Earth as it relates to life in the universe.

Fill in the blank(s) with the appropriate word(s).

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Match the correct case study in conservation biology with its animal.

A. fruit bats-introduction of new species B. whales-pollution C. prairie chickens-loss of genetic diversity D. Lake Victoria cichlids-loss of habitat E. songbirds-introduction of new species

Biology & Microbiology