Which of the following is (are) true in plants? I) Mitosis occurs in gametophytes to produce gametes. II) Meiosis occurs in sporophytes to produce spores. III) The gametophyte is within the flower in angiosperms
A) only I
B) only II
C) only III
D) only I and II
E) I, II, and III
Answer: E
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A pine tree is
(a) a sporophyte. (b) a gametophyte. (c) diploid. (d) both a and c.
The woody plant genus Frankia produces root nodules that harbor
a. actinobacteria b. rhizobium c. fungi d. green algae e. aktinites
It is estimated that anammox and the anammox reaction may contribute as much as 20% to the cycling of nitrogen in the world's oceans.
Answer the following statement true (T) or false (F)
Hormones as a general class are chemicals produced by the endocrine system that
A) control embryonic development. B) regulate a variety of body functions, such as metabolism. C) are stimulated by the action of metabolic enzymes. D) travel by specific pathways to specific target cells.