What is the outermost layer of the digestive tract called?
A.) Mucosa
B.) Submucosa
C.) Muscularis
D.) Serosa
Ans: D.) Serosa
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Restriction endonucleases in bacteria may have evolved in order to
A. protect the bacteria from infection by viruses. B. carry out natural genetic engineering. C. use nucleic acids as a food (energy) source. D. All of the choices are correct.
Intrinsic factor is used to aid in the absorption of
a. vitamin E. b. vitamin C. c. vitamin D. d. vitamin K. e. vitamin B12.
Which of the following is NOT an accessory organ?
a) liver b) gall bladder c) pancreas d) stomach
Desert plants have waxy coatings to help reduce water loss. Many also have modified leaves in the shapes of needles to reduce surface area and reduce water loss. These modifications are examples of :
What will be an ideal response?