The ripening of fruit and the dropping of leaves and fruit are principally controlled by _____
A) auxins
B) cytokinins
C) indole acetic acid
D) ethylene
E) carbon dioxide concentration
Answer: D
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When added to water at neutral pH (7.0), an acid will
a. act as a proton donor, raising the pH of the solution. b. act as a proton acceptor, raising the pH of the solution. c. act as a proton donor, lowering the pH of the solution. d. act as a proton acceptor, lowering the pH of the solution. e. do nothing since the aqueous solution is neutral.
When calculating the gross national product, economists consider whether an activity is environmentally harmful.
Answer the following statement true (T) or false (F)
Identify and briefly describe the two phyla of seedless vascular plants. Include one or two
representatives of each phylum. What will be an ideal response?
Which membrane enclosed organelles most likely evolved in a similar manner?
A.) mitochondria and ER B.) chloroplasts and peroxisomes C.) mitochondria and the golgi apparatus D.) the nucleus and ER E.) mitochondria and nucleus