Feeding levels in an ecosystem are also known as

a. nutritional levels.
b. nourishment levels.
c. trophic levels.
d. niche levels.
e. biome levels.


C

Biology & Microbiology

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Staphylococcus aureus is a common foodborne disease, because it

A) grows on common foods. B) is present in some humans that work in food processing. C) produces several heat-stable enterotoxins. D) grows on many foods, is present in some humans that work in food processing, and produces several heat-stable enterotoxins.

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The ancestors of modern ________ performed the oxygenic photosynthesis responsible for converting our anoxic planet to an oxygenated one.

A. Firmicutes B. Proteobacteria C. Cyanobacteria D. Crenarchaeota

Biology & Microbiology

What is the most abundant tissue type in the

human body?

a. connective b. muscular c. epithelial d. neural e. adipose

Biology & Microbiology

Electrical signals are converted into chemical signals at the end of a(n) _____

a. neuroglial cell b. muscle cell c. microvillus d. neuron cell body e. axon

Biology & Microbiology