In the life cycle of flowering plants, meiosis
a. occurs before seed formation.
b. occurs in the ovule.
c. gives rise to microspores.
d. gives rise to megaspores.
e. does all of these.
Answer: e
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What type of cell signaling uses neurotransmitters to innervate its target organ?
What will be an ideal response?
Which statement is false about prostaglandins?
a. They are local signaling molecules. b. They promote blood flow to injured tissue. c. They cause blood vessels to dilate. d. They act as pheromones. e. They alter chemical conditions in nearby tissues.
The distinctive feature of chloroplasts is that they contain a green pigment called:
A. Gram stain. B. hemoglobin. C. chlorophyll. D. chromatin. E. keratin.
In some mammals, what is the by-product of digestion that is produced in the stomach, and in which animals may it be produced in large quantities?
a. methane, in carnivores b. methane, in ruminants c. mucus, in ruminants d. mucus, in carnivores