. Briefly describe some of the pros and cons of using ecotourism to generate income from a natural area
What will be an ideal response?
ANSWER: Ecotourism employs local people and increases support for the preservation of ecosystems
and endangered species. However, heavy tourism traffic can damage ecosystems and put
pressure on ecosystem services like sewage disposal and clean water supplies.
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Where would you most likely find an integral membrane protein?
A) on the inside surface of the cell membrane B) on the outside surface of the cell membrane C) floating freely in the cytoplasm D) spanning the cell membrane, with parts of the protein visible from both the inside and the outside of the cell
The exchange of oxygen and carbon dioxide occurs in the human lungs in the ____
a. bronchi b. alveoli c. bronchioles d. trachea e. glottis
Which protist is responsible for late blight of potatoes, the cause of the Irish potato famine in the mid 19th century?
a. Phytophthora b. Myxomycota c. Macrocystis d. Physarum e. Giardia
When a doctor uses a stethoscope to listen to your heart and hears the lub-dub sound, she is actually listening to the:
A) blood surging through the arteries. B) electrical signals that control heartbeat. C) valves in the heart closing. D) contraction of the cardiac muscle in the ventricles.