Which of the following health problems might be cured with embryonic stem cell treatment?
a. Muscular dystrophy
b. All of these choices
c. Heart disease
d. Parkinson's disease
e. Blindness
b
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The function of mechanical digestion is to break down large chunks of food into smaller pieces. Why is this important? Smaller pieces of food _____
A) do not taste as good as larger pieces of food B) have more surface area for chemical digestion than do larger pieces of food C) are easier to excrete than are larger pieces of food D) are more easily stored in the stomach than are larger pieces of food
Some prokaryotes have a capsule, which is an external layer of polysaccharides that protects the cells from physical
damage.
Indicate whether the statement is true or false.Animals are net
A. O2 consumers and CO2 producers. B. O2 and CO2 producers. C. O2 and CO2 consumers. D. O2 producers and CO2 consumers.
What types of antigen do T cells NOT recognize?
a. self-antigens b. cancer antigens c. bacterial antigens d. processed fragments of protein antigens displayed on surfaces of body cells