Liverworts, hornworts, and mosses are grouped together as the Bryophytes. Besides not having vascular tissue, what do they all have in common?
A) They are all wind pollinated.
B) They are heterosporous.
C) They can reproduce asexually by producing gemmae.
D) They require water for reproduction.
D
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During the production of beer, the barley must be “malted,” which means it is
a. converted to simple sugars. b. exposed to baker’s yeast. c. exposed to brewer’s yeast. d. fermented.
Scleroderma is a disorder that can be caused by
A) retained fetal cells with surfaces that are similar to the mother's cells. B) retained fetal cells with surfaces that are very different from those of the mother. C) retained fetal cells with surfaces that are similar to the father's cells. D) repeated exposure to the scleroderma virus.
In humans, the egg provides the mitochondria to the zygote. In plants, which organelles would be provided by the egg and not by the sperm?
A. nuclei and chloroplasts B. chloroplasts and mitochondria C. nuclei D. mitochondria E. chloroplasts
Which of the following early embryos would be the easiest to distinguish from the others?
a. bird b. honey bee c. human d. snake e. catfish