In eucaryotic cells, what are the sites of photosynthesis?
A) mitochondria
B) plasmids
C) plastids
D) ribosomes
C) plastids
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Which of the following is true of a gram-positive bacterium, and not of a gram-negative bacterium?
A. It has a thick cell membrane. B. It is more likely to trigger an immune response and cause inflammation and fever. C. It has a nucleus. D. It is larger, and thus weighs more grams. E. Its cell wall is made of a thick layer of peptidoglycan.
Diatoms are characterized by ____, and are the source of economically useful_____
a. calcium carbonate shells; ozone b. calcium carbonate sheaths; petroleum c. silica shells; diatomaceous earth d. silica sheaths; limestone e. silica carbonate shells; diatomaceous earth
At what point in the cycle is meiosis I completed?
1.1
2.2
3.3
4.4
5.5
6.6
7.7
If you were running a tree nursery and wanted to keep your trees dormant until the customer could plant them, which hormone would you spray on the trees?
A) Gibberellin B) Ethylene C) Auxin D) Abscisic acid E) Cytokinin