Which of the following is described as a purchase strategy of agricultural products at fixed prices before they will be needed?

futures
imports
fair trade
direct market

In which way does nicotine cause addiction? by stimulating the brain's pleasure center by increasing blood-sugar levels by decreasing dopamine levels by reducing depression and anxiety

Which of the following is not considered a lymph node function? to house immune cells to transport lymph to filter blood to fight infection

Which of the following processes within viral replication is the greatest source of genetic variation in rna virus populations? a) high mutation rate due to lack of proofreading of rna genome replication errors.b) transcription from the host cell rna polymerase introduces numerous mutations.c) capsid proteins from the host cell can replace the viral capsid.d) viral rna is translated by host cell ribosomes.