Which of the following is necessary for evolution to occur?
a. Population genetics must change.
b. Artificial selection must occur.
c. Adaptation to the environment must occur.
d. Change must occur to the environment.
e. Variation must exist.
Ans: e. Variation must exist.
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Crossing over is partially responsible for our genetic diversity
a. True b. False Indicate whether the statement is true or false
What is the order of structures or spaces that a surgeon will pass through to operate on a human lung?
A. skin -> intercostal muscles -> parietal pleural membrane -> pleural cavity -> visceral pleural membrane -> lung tissue B. skin -> pleural cavity -> intercostal muscles -> visceral pleural membrane -> parietal pleural membrane -> lung tissue C. skin -> visceral pleural membrane -> intercostal muscles -> pleural cavity -> parietal pleural membrane -> lung tissue D. skin -> intercostal muscles -> visceral pleural membrane -> pleural cavity -> parietal pleural membrane -> lung tissue E. skin -> intercostal muscles -> pleural cavity -> parietal pleural membrane -> visceral pleural membrane -> lung tissue Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about the lungs? What other information is related to the question? Choose Answer Given what you now know, what information is most likely to produce the correct answer? Reflect on Process Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
During the process of gas exchange, gases move ____
a. by active transport b. down electrical gradients c. through membrane channels d. by facilitated diffusion e. down partial pressure gradients
The collective human ecological footprint is now much larger than Earth's sustainable resource base
Indicate whether the statement is true or false