Which of the following is NOT found in the cell envelope of a Gram-positive bacterium?

A) outer membrane
B) cell wall
C) cell membrane
D) peptidoglycan


Ans: A) outer membrane

Biology & Microbiology

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Staphylococcus aureus toxin is

A. heat-stable. B. an exotoxin. C. an endotoxin. D. heat-sensitive. E. heat-stable AND an exotoxin.

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Which bone is broken most often?

a. humerus b. radius c. ulna d. clavicle e. scapula

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Explain the features necessary for both brown algae and dinoflagellates to be classified in the supergroup SAR.

What will be an ideal response?

Biology & Microbiology

Chinese privet is a plant that is native to China. Over 150 years ago, Chinese privet was introduced to the United States as a fast-growing shrub that serves as an excellent privacy hedge

With no natural predators, Chinese privet quickly established itself and spread in natural areas throughout the southeast and eastern seaboard of the United States. Its dominance in these areas has jeopardized the survival of native plant species. Chinese privet provides evidence that ________. A) introducing non-native organisms can cause environmental damage B) American gardeners can easily control the spread of Chinese privet C) integrated pest management strategies will not decrease Chinese privet populations D) non-native plant species have Type I survivorship curves

Biology & Microbiology