Golgi apparatus
What will be an ideal response?
modifies and packages proteins for transport and secretion
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Ricin is toxic because
a. it binds to eukaryotic DNA. b. it binds to eukaryotic mRNA. c. it blocks food from entering the cell. d. it inactivates ribosomes. e. it binds to nerve tissue and causes paralysis.
Phosphorus is an essential element in all living things and is a component of
A. ATP and DNA. B. most amino acids. C. nearly all vitamins. D. carbohydrates.
The archeological record indicates when people began using various grains and legumes and when these food plants were domesticated
Looking at the figure below, estimate how long humans have been selectively breeding grains. (Note that the gaps in the figure represent periods when no evidence of the crop indicated was found.) What will be an ideal response?
A newly described bacterial species has been shown to use CO2 as its carbon source. Its energy source and its source of reducing power (electrons) are inorganic chemicals. Which term would best describe this nutritional type?
A. Chemolithoautotroph B. Photoorganoheterotroph C. Chemolithoheterotroph D. Photolithoheterotroph