A species that is so important to its community (such as the sea otter) that their removal can dismantle a food web is termed a species.

A. capstone
B. flagstone
C. cobblestone
D. cornerstone
E. keystone


E. keystone

Biology & Microbiology

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Human disease(s) from milk may include

A. brucellosis. B. anthrax. C. amoebiasis. D. tuberculosis. E. brucellosis AND tuberculosis

Biology & Microbiology

Mycobacterium and Nocardia are distinguished from other bacteria by the ________ stain.

A. basic B. Gram C. acid-fast D. endospore E. methylene blue

Biology & Microbiology

It is believed that a bacterium, rather than coffee, alcohol, or spicy foods, cause ulcers. What is the genus of this bacterium?

a. E. coli b. Salmonella c. Botulina d. Yersina e. Helicobacter

Biology & Microbiology

Approximately how much of the mammalian genome is composed of repetitive DNA?

What will be an ideal response?

Biology & Microbiology