Cytotoxic T cells target
A) cancer cells and virally infected cells.
B) skin cells and blood cells.
C) bacterial cells and fungal cells.
D) B cells and macrophages.
A) cancer cells and virally infected cells.
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Skeletal muscle H zones are composed of ____
a. discs to which thin filaments are anchored b. stacked thick filaments along with the parts of thin filaments that overlap both ends c. thin filaments but no thick filaments d. thick filaments but no thin filaments e. stacked thin filaments along with parts of thick filaments that overlap both ends
What would be a consequence of a missing or damaged epiglottis?
a. an inability to swallow food b. digestive acid escaping into the esophagus c. aspiration of food into the lungs d. incomplete neutralization of chyme
Water comprises at least ____ of the body of salps
a. 5% b. 10% c. 25% d. 70% e. 95%
Answer the following questions true (T) or false (F)
1. Competitive exclusion of native organisms is a frequent result of the introduction, by humans, of non-native organisms to an environment. 2. Competition among species may lead to resource partitioning in an ecosystem. 3. Kudzu replacing native plants is a type of predation.