A pathogenic bacterial species has mutated and is no longer able to synthesize a capsule. Which outcome would you predict?
A. The mutated bacteria will be more virulent.
B. The mutated bacteria will be protected from plasmolysis in hypertonic environments.
C. The mutated bacteria will not be able to cause disease as readily.
D. The mutated bacteria will undergo osmotic lysis in hypotonic environments.
Answer: C
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Lizards can control spider populations on Caribbean islands by which density dependent
mechanism(s)?
a. Predation. b. Competition. c. Predation on a common predator. d. Predation and competition. e. Predation, competition, and predation on a common predator.
Marine bony fishes produce a very small amount of urine whereas freshwater bony fish produce a large volume of urine. Why are they different?
What will be an ideal response?
A taxon that includes all the descendants of an ancestor is called:a
paraphyletic. b. homophyletic. c. monophyletic. d. phenetic. e. polyphyletic
The ground tissue lacking in the primary eudicot root is:
a. pith b. periderm c. cortex d. vascular cambium
e. pericycle