The image below shows the lac operon, which breaks down lactose in
bacteria. Which statement correctly describes the expression of this gene?
lactose
Promoter
Sequence
RNA
Polymerase
Operator
) A. Gene expression is influenced by either high or low lactose levels
in the environment
B. Gene expression is only influenced by low lactose levels in the
environment.
C. Gene expression is not influenced by lactose levels in the
environment
D. Gene expression is only influenced by high lactose levels in the
environment.

The pharynx is the structure in the body that serves as a pathway of both air and food. how does the body make sure that food does not get into the lungs? the salivary glands secrete enzymes that pull food out of the air pathway. the small intestine pushes the air out of the digestive system. the pancreas breaks down food in the air pathway. the epiglottis closes the air pathway so that food will not enter it.

Taq polymerase is an enzyme isolated from the organism thermophilus aquaticus. this organism has been found living in the hot springs of yellowstone national park. this enzyme is used to copy human dna from crime scenes. most reactions are performed at ranges similar to those of the human body; however, what considerations should be made for optimum use of this enzyme? view available hint(s)taq polymerase is an enzyme isolated from the organism thermophilus aquaticus. this organism has been found living in the hot springs of yellowstone national park. this enzyme is used to copy human dna from crime scenes. most reactions are performed at ranges similar to those of the human body; however, what considerations should be made for optimum use of this enzyme? the enzyme will not work on human dna.nothing should be altered.the ph should be decreased.the temperature should be raised.

Drag each tile to the correct box. arrange the layers and faults from oldest to youngest.