Hydrogen bonds are non-polar.

a. true
b. false


Answer: b. false

Biology & Microbiology

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What popular belief of the time did Lyell's theory of uniformity challenge?

a. Fossils are not evidence of extinct species. b. The Earth is only 6,000 years old. c. The Earth does not change over time. d. Species do not change over time. e. All animals exists in perfect form.

Biology & Microbiology

In biology lab, you are observing and dissecting flatworms. Their bodies are very thin, even see-through, and their thin body surface allows them to exchange gases of oxygen and carbon dioxide with the underlying cells and tissues. Flatworms lack which of the following anatomical systems?

A. nervous B. movement C. respiratory D. digestive E. excretion

Biology & Microbiology

Pasteur chose the Latin root word for "virus" meaning

A. non-living. B. particle. C. poison. D. contagious. E. extremely small.

Biology & Microbiology

Flatworms that contain both male and female reproductive organs in the same individual are called ________

Fill in the blank(s) with correct word

Biology & Microbiology