Hormones derived from modified amino acids are classified as ___________________. Fill in the blank(s) with the appropriate word(s)
ANSWER: amines
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The ______________ is a digestive cavity in which food enters an opening at one end and passes through the animal in one direction as it is digested.
A. gastrovascular cavity B. stomach C. alimentary canal D. epithelial cavity E. intestine
During attachment of phage to E. coli, the phage
A. actively seek out the bacteria. B. randomly bump into the bacteria. C. attach to proteins or carbohydrates on the bacterial surface. D. attach to the bacterial RNA. E. randomly bump into the bacteria AND attach to proteins or carbohydrates on the bacterial surface.
Which of the following represents energy flow in a grazing food web?
a. producers ? detritivores ? decomposers b. producers ? decomposers ? detritivores c. producers ? herbivores ? decomposers ? carnivores d. producers ? herbivores ? carnivores ? decomposers e. producers ? herbivores ? detritivores ? carnivores
A biologist interaction between two organisms, where each individual derives a fitness benefit is termed
a. mutualism b. metabolism c. mutual comparison d. mutual of omaha e. metaboly