A beautiful wood desk you may do your homework on was once a living tree, but after being cut down its tissues died. Now, it only exhibits what property of life?
A. Organization
B. Metabolism
C. Homeostasis
D. Sensitivity
A
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Researchers discovered an enzyme in HIV called protease. Once the enzyme's structure was known, researchers began looking for drugs that would fit into the active site and block it
HIV is the virus that causes AIDS. In the mid-1990s, A) vaccination B) denaturation C) allosteric regulation D) competitive inhibition
What is the main component of an animal cell membrane?
A. phospholipids B. polynucleotides C. aquaporins D. glycolipids E. cholesterol
The function of the cell type labeled 3 in Figure 43-5 is:
a. to detect shape and movement. b. to receive messages from the bipolar cells. c. to receive input from the receptor cells. d. to stimulate the ganglion cells. e. to send a neural impulse to the brain
These stem cells are able to become the many different types of cells found in our blood — red blood cells, white blood cells, platelets.
A. hematopoietic B. RBC/WBC C. germinal D. omnipototential