Tissues functioning together make up _____
A) organs
B) membranes
C) organ systems
D) organelles
E) organisms
Answer: A
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The dinoflagellate Pfisteria is an important protist. Which of the following statements DOES NOT describe its attributes?
A. It causes nervous disorders in humans. B. It uses toxins to attack fish which it then consumes. C. It lies dormant on the bottom until stimulated by chemicals from fish. D. It is a major cause of food poisoning in humans. E. Its toxins damage fish skin thereby increasing exposure to the pathogen.
The main center for homeostatic control of the
internal environment is the a. pineal gland. b. medulla oblongata. c. hypothalamus. d. thalamus. e. cerebrum.
Once several different but related sequences are obtained, which step must be performed BEFORE a phylogenetic tree is constructed?
a. cladistics b. parsimony c. sequence alignment d. threshold scoring
What happens when the concentration of a solute is equal on both sides of a plasma membrane?
A. the particles will begin to move against the concentration gradient B. the net movement of particles through the plasma membrane will stop C. the cell will continue to grow until it finally bursts D. the cell will begin to shrink because the water levels are not equal