When we metabolize our food, we produce heat that helps to keep us warm. Which of the following best describes why?
A) Producing ATP from ADP is exothermic; therefore, energy is released in the form of heat.
B) When we break down food, all energy in the food is directly released in the form of heat.
C) When we break down our food, the reactions are not 100 percent efficient; therefore, energy is lost as heat.
D) Chewing is exothermic; therefore, energy is released in the form of heat when we eat food.
Answer: C
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_____ Low species richness can contribute to ecosystem stability. _____ High species richness can increase ecosystem resistance to drought. _____ Low species richness can make an ecosystem more susceptible to invasive species. _____ High species richness reduces overall ecosystem productivity.
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____________________ Indicate whether the statement is true or false.
Which of the following functions performed by the skin would be lost or seriously compromised if someone suffered a severe burn over most of the body?
A. prevention of heat and water loss B. conversion, in the presence of ultraviolet light, of precursor molecules to vitamin D C. production of sweat that evaporates and cools the body when it is overheating D. prevention of massive and continuous infection from invasion by external bacteria, viruses, and parasites E. All of these are vital functions of the skin and would be compromised.
Images of living specimens can be produced using atomic force microscopes
Indicate whether the statement is true or false