Lily is researching the light-sensing rod cells of the eye. she decides to use stem cells to produce new rod cells. which statement best explains why lily is using stem cells for this purpose?
a. specific genes in a rod cell’s dna can be activated to produce new stem cells.
b. specific genes in a stem cell’s dna can be activated to produce new rod cells.
c. all genes in a rod cell’s dna are activated, so new stem cells are produced each time the cell divides.
d. all genes in a stem cell’s dna are activated, so new rod cells are produced each time the cell divides.
e. none of the genes in a rod cell’s dna are activated, so new rod cells can be produced only from stem cells.

1. environmental factors, such as ph and temperature, can affect the function of an enzyme. a. true b. false 2. which of the following is an organic molecules (ex. vitamins) that an enzyme? a. coenzyme b. product c. active site d. substrate 3. how do enzymes effect the speed of a chemical reaction? a. they speed it up b. they slow it down c. they have no effect on the speed of a reaction 4. during a chemical reaction, an enzyme is used up so that it can only be used one time. a. true b. false 5. which of the following results from a chemical reaction that is catalyzed by an enzymes? a. active site b. product c. substrate d. coenzyme

What is the importantence of the carbon and nitretan cycles in the environment

Recently, crops of vegetables such as lettuce and green onions have been contaminated, while they are still on the farm, with bacteria that cause food poisoning. how will science influence the way the government responds to prevent an increase in food-borne diseases? because science has shown that lettuce and green onions are not nutritionally valuable, the government may pass laws that ban the sale of lettuce and green onions. because science has shown that there is no way to prevent bacterial contamination, the government may pass laws that punish businesses that buy lettuce and green onions. because science has shown that the washing of hands prevent the spread of infectious diseases among people, the government may pass laws that require hand washing by everyone who handles food. because science has shown there are ways to find the source of the contamination, the government may pass laws that require farm practices that reduce the contamination of lettuce and green onions.