Biological digestion is defined as
a. taking food into a digestive chamber.
b. breaking food down into smaller pieces that
can be absorbed into cells.
c. moving nutrient molecules into the internal
environment.
d. expelling indigestible materials.
e. all of these.
B
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Packaged food in the United States must have a nutrition label, but there is not a requirement that genetically modified food be labeled as such. Should food producers and distributers be required to identify products made from genetically modified plants or livestock?
1.Yes. I do not want to purchase or eat food that is not natural, and should be given all the information I need to make that choice for myself. 2.No. There is no scientific evidence that genetically modified organisms are harmful to humans. The technology allows us to better produce foods without the use of pesticides and herbicides, which can be harmful to human health. Therefore, it is not worth the added cost of requiring new labeling
The cell junctions labeled “A” in the figure
a. prevent movement of materials between cells. b. are found in tissues subjected to stretching. c. allow the free passage of materials between cells. d. are found mostly in heart muscle. e. are found in most tissues except in the stomach.
The rain shadow associated with mountains
A. is on the downwind side and has a wetter climate than the upwind side of the mountain. B. is on the upwind side and has a drier climate than the downwind side of the mountain. C. is on the downwind side and has a drier climate than the upwind side of the mountain. D. is on the upwind side and has a wetter climate than the downwind side of the mountain.
When genes are inserted into lung cells of cystic fibrosis patients, this kind of treatment is referred to as ________.
Fill in the blank(s) with the appropriate word(s).