Why is double fertilization a critical process for feeding human populations?
What will be an ideal response?
During the double fertilization process one sperm fertilizes an egg, which results in a zygote, and the second sperm fertilizes the central cell, which results in endosperm. The endosperm is starchy and supplies the calories for the world's grain crops that feed much of the world.
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On a cladogram, branches represent
a. common ancestors. b. groups of organisms that share a common ancestor. c. distinguishing characters. d. common characters. e. extinct species.
Which of the following organisms do NOT
reproduce cells by mitosis?
a. plants b. fungi c. animals d. archaea e. plants and fungi
During which phase does transcription stop, and the DNA begin to appear grainy and start to condense?
a. interphase b. early prophase c. prophase d. anaphase e. early anaphase
Which step in making beer involves sprouting and softening the barley to release amylases to act on starch and proteases to digest protein?
A. Preparing a mash B. Fermentation C. Wort boiled with hops D. Aging E. Malting