马铃薯的2n=48，是个四倍体，曾获得马铃薯的单倍体，经细胞学检查，发现该单倍体在减数分裂时形成12个二价体，可知马铃薯是个同源四倍体。（）
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某植物体细胞内只有一套染色体（一个染色体组），含单套基因，所以它是一倍体（ ）
A. 对
B. 错
普通小麦染色体是2n=42，二粒小麦2n=28，一粒小麦2n=14，所以一粒小麦就是单倍体。（ ）
A. 对
B. 错
Another title for this reading could be _____
A. Water for the Rich. Not for the Poor
B. a. Why We Waste Water: Two Points of View
C. Water Shortages and Problem Solver
D. Politics and Water: Fighting for a Drink
Which of these statements about Castile-la Mancha is NOT true?
A. Its situation is common to many places around the world
B. Overfishing has caused a great deal of environmental damage
C. Illegal well digging is a significant problem.
D. The Los Ojos area has been dry for over 30 years.
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