Temperature, pH, and ionic concentrations each play an important role in the proper functioning of enzymes.
Answer the following statement true (T) or false (F)
True
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Nonsense codons are
A) codons that code for multiple amino acids. B) codons that do not code for an amino acid. C) codons that can be read forward or backward. D) start codons.
The ____ gives structure to many unwalled, single-celled protists.
A. contractile vacuole B. pellicle C. Golgi body D. endoplasmic reticulum E. nucleus
Steve decides to make a meal for some of his friends. He uses a variety of foods to prepare the meal, including some canned mushrooms. Unfortunately, he gives his friends a mild case of botulism food poisoning. His friends report blurred vision and
trouble speaking due to a flaccid paralysis of the muscle cells by the botulinum toxin. Propose a mechanism by which this toxin would inhibit muscle contraction. What will be an ideal response?
Why is a random dispersal pattern quite rare in nature?
A. Because only aquatic resources are commonly randomly dispersed. B. Because resources in nature are rarely randomly spaced. C. Because most animals have social behavior such as forming flocks or herds. D. Because most organisms have defined territories created via competition.