All cells have the following except ___?

a. Plasma membrane
b. Cell Wall
c. Chemical reactions
d. Cell membrane


Answer: b. Cell Wall

Biology & Microbiology

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Draw a microbial-based nitrogen cycle. In the open ocean there is plenty of sunlight and carbon dioxide for primary production, yet photosynthesis is limited in the open ocean compared to other aquatic environments

What limits photosynthesis in the open ocean? What will be an ideal response?

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The outbreak of measles within the last few years was due to

A. mutation of the virus. B. change in the environment. C. a decline in vaccination of children in the previous years. D. increase in sensitivity of detection techniques.

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Which organisms have exoskeletons?

a. earthworms b. humans c. sea anemones d. insects and clams e. amphibians

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The polysaccharide that strengthens plant cells is called

a) sucrose b) cellulose c) glucose d) galactose

Biology & Microbiology