Why are children often told that if they eat too much candy their teeth will fall out?
A. Sugars gradually replace the tooth enamel.
B. Bacteria use the sugar to make ATP. This fermentation process produces acids as a by-product.
C. Sugar attacks tooth enamel.
D. Bacteria secrete acids in order to digest the sugar molecules.
Answer: B
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Stanley Miller conducted a famous experiment in the 1950s. This experiment
a. tried to determine how evolution occurs. b. mimicked the early Earth's atmosphere as we know it today. c. showed that simple organic molecules came from outer space. d. used sunlight as an energy source. e. showed that some organic molecules could be formed from non-organic starting materials.
Histoplasmosis
a. is a respiratory disease. b. is common in the Midwestern and Southcentral United States. c. is transmitted through inhaled spores. d. may be fatal in immune-suppressed individuals. e. is described by all of these.
When a group of cells works together for a common function, such as in a tissue, they must have a network to communicate with each other. What is that network called?
What causes differences in life history traits?
A. Limits on available resources B. Limits on available resources and declining likelihood of survival over time C. Declining likelihood of survival over time D. All things listed E. Genes that cause a variety of effects on phenotype