Differentiate between exponential and logistic growth curves. Give examples of the conditions under which each would occur
What will be an ideal response?
Exponential growth (a J-shaped curve) is growth when there are no constraints. This occurs when a population is small and environmental conditions are ideal for the organism in question. Mold beginning to grow on a piece of bread and bacteria colonizing a dead animal are examples. Logistic growth (S-shaped growth curve) rises almost exponentially at first and then begins to level off as the effects of limiting factors become stronger. A population introduced into a new environment where there are other organisms will experience limitations quickly, and these limitations will limit the population growth.
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Sudden or catastrophic events, such as volcanic eruptions and tsunami, can be explained by ____
A)big bang theory B)theory of natural selection C)third law of thermodynamics D)principle of uniformitarianism E)scientific method
In the vertical, the pressure gradient force points ____ and gravity points ____
A) toward Earth; away from Earth B) toward Earth; toward Earth C) away from Earth; away from Earth D) away from Earth; toward Earth
Americans have moved to Canada for jobs, and for a better political atmosphere. In fact, in British Columbia alone there are more than (choose closest answer) ________ legal Americans residing
A) 80,000 B) 250,000 C) 640,000 D) 1,000,000
How does water have such strong surface tension?
a) Water molecules are constantly bumping against each other, creating strong surface tension. b) Water is the universal solvent, and so has extremely strong surface tension. c) Hydrogen bonds form between adjacent molecules due to water's polarity, thus giving it strong surface tension. d) Water has high kinetic energy, resulting in strong surface tension.