The pistil of a flower is best described as
A. a structure to defend against insects.
B. a grouping of filaments.
C. a place where pollen is produced.
D. a place for sperm to be produced.
E. a single carpel or group of fused carpels.
Answer: E
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What type of cells do the apicomplexan parasite Plasmodium infect?
a. blood only b. liver only c. brain only d. both blood and liver e. blood, liver, and brain
tRNA molecules are able to act as adapters between amino acids and mRNA during translation because:a
tRNA binds to ribosomes. b. tRNA can bind to both mRNA and an amino acid. c. tRNA anticodons bind to amino acids. d. tRNA is recognized by RNA polymerase. e. tRNA molecules bind to promoter sequences to initiate transcription.
Which one of the following steps of the scientific method should come only after a hypothesis has been formed?
A. question formulation B. resource exploration C. experimentation D. observation
Elements that are required in relatively large amounts by microorganisms are called ________.
A. meganutrients B. macromolecules C. multivitamins D. macronutrients