Which are accurate statements about digestion? (Check all that apply.)
_____ Most ingested food particles are digested in the stomach.
_____ The muscles in the walls of the pharynx and esophagus contribute to swallowing.
_____ Carbohydrates and lipids are digested first, in order to supply the organism with the most immediate energy.
_____ The gizzard contains sand or tiny stones swallowed by the bird.
_____ Most ingested food particles are digested in the stomach.
__X__ The muscles in the walls of the pharynx and esophagus contribute to swallowing.
_____ Carbohydrates and lipids are digested first, in order to supply the organism with the most immediate energy.
__X__ The gizzard contains sand or tiny stones swallowed by the bird.
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In the process of fermentation an organic substrate, such as glucose, is reduced and an intermediate of the pathway, such as pyruvate, is oxidized.
Answer the following statement true (T) or false (F)
A lake that is supplied with a large amount of phosphorus is likely to
a. be devoid of living organisms. b. support large numbers of fish. c. be crystal clear. d. become eutrophic. e. support many feeding levels.
All living organisms are multicellular
Answer the following statement(s) true (T) or false (F)
The ranges of black bears and brown bears overlap. However, black bears spend most of their time in the woods and
brown bears spend most of their time along the river. Which of the following best describes why black and brown bears do not interbreed? a. habitat isolation b. temporal isolation c. biological isolation d. evolutionary isolation e. environmental isolation