High stomach acidity
a. creates ideal conditions for carbohydrate digestion.
b. promotes emulsification of fats.
c. favors protein digestion.
d. blocks the release of histamine, thereby favoring production of peptic ulcers.
e. converts lipases into their active forms.
C
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A) an autoimmune disease B) a typical skin allergy (contact dermatitis) that can be treated by antihistamines C) an organ transplant, such as a skin graft D) the effect of exhaustion on the immune system E) anaphylactic shock immediately following exposure to an allergen
A cell that is observed under the microscope is found to have its DNA enclosed in a nucleus, and has
other specialized internal compartments. The cell is a(n) ____.
a. prokaryote b. bacterium c. eukaryote d. E. coli e. P. aureus
The major part of the angiosperm life cycle is the:
a. diploid gametophyte b. diploid sporophyte c. haploid gametophyte d. haploid sporophyte e. fertilization step
Scientists believe that mitochondria may have evolved from bacteria because ____
a. they both have cristae membranes b. mitochondria have their own DNA c. their shapes and sizes are exactly the same d. both are surrounded by a cell wall e. both can live independently