The bacterium Bacillus thuringiensis can withstand heat, dryness, and toxic chemicals that would kill most other bacteria. This indicates that it is probably able to form a protective structure called ____________.
A. endotoxins
B. pseudopodia
C. endospores
D. cellulose
C. endospores
Biology & Microbiology
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The basic unit of a DNA molecule is the
A. nitrogenous base. B. sugar-phosphate backbone. C. amino acid. D. nucleotide. E. ribose sugar.
Biology & Microbiology
What benefit are corticosteroids in the treatment of asthma?
A) They induce bronchoconstriction. B) They induce bronchodilation. C) They decrease mucus secretion into the airways. D) They increase blood flow to the airways. E) They reduce inflammation of the airways.
Biology & Microbiology
The impact of a keystone species is proportionate to their abundance in an ecosystem
____________________ Indicate whether the statement is true or false.
Biology & Microbiology
Adjacent water molecules are joined by ________ bonds
A) covalent only B) ionic C) polar and covalent D) hydrogen
Biology & Microbiology