A change in a cell's DNA sequence is

replication.
transcription.
a mutation.
translation.
an operon.


a mutation

Biology & Microbiology

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Companion cells function to ________

a. form living tubes for sugar transport b. load sugar into sieve tubes c. photosynthesize and produce sugar d. transport water throughout the plant

Biology & Microbiology

Where is the trachea in reference to the esophagus in humans?

a. dorsal, or behind b. superior, toward the head c. ventral, or in front d. inferior, toward the feet

Biology & Microbiology

At rest, the largest volume of blood is in _____

a. arteries c. capillaries b. veins d. arterioles

Biology & Microbiology

What are the guidelines to setting up a healthy diet?

A) eat a variety of foods B) choose foods high in saturated fats C) eat the right number of calories D) eat foods high in trans fat E) minimize sweets

Biology & Microbiology