At the top of a pyramid of biomass are the
a. primary producers.
b. secondary producers.
c. primary consumers.
d. secondary consumers.
e. tertiary consumers.
E
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Osmosis describes:
A. the movement of water from areas of lower solute concentration to areas of higher solute concentration. B. the movement of water from areas of lower water concentration to areas of higher water concentration. C. the movement of solutes from areas of higher water concentration to areas of lower water concentration. D. the movement of solutes from areas of lower solute concentration to areas of higher solute concentration. E. the movement of solutes from areas of higher solute concentration to areas of lower solute concentration.
Which test is used to differentiate P. multocida from Mannheimia haemolytica?
a. Indole b. Catalase c. Nitrate d. Sucrose
The Hardy-Weinberg formula is valuable for the calculation of changes in
a. population size. b. speciation. c. allele frequencies. d. mutation. e. dimorphism.
When an action potential from a motor neuron arrives at the neuromuscular junction (NMJ), a series of events occurs that leads to muscle contraction. Which of the following events will occur last (that is, after all of the others)?
A) acetylcholine (ACh) release B) conformational change in troponin C) depolarization of the muscle cell D) release of Ca2+ from the sarcoplasmic reticulum