Sea stars, otters, and beavers through their influence on prey populations and habitat modification are considered ____ species

Fill in the blank with the appropriate word.


keystone

Biology & Microbiology

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________ and ________ groups are negatively charged functional groups of carbon, whereas the ________ group is a positively charged functional group.

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

Biology & Microbiology

A key adhesion molecule is ________, which decreases cell adherence when present in insufficient quantities.

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

Biology & Microbiology

Fungi are important because of their ability to

A. help many plants grow. B. cause disease in plants. C. make certain foods and beverages. D. spoil food. E. All of the above.

Biology & Microbiology

Which of the following is a germ layer that forms the lining of the urinary, respiratory, and digestive tracts?

A) ectoderm B) endoderm C) mesoderm D) embryonic disk

Biology & Microbiology