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【简答题】
在（a）雌蚱蜢（2n＝24），（b）雄蚱蜢（2n＝23），（c）女人（2n＝46）以及（d）男人（2n＝46）中各有多少基因连锁群？
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举报参考答案：
举一反三
【单选题】Children start out as natural scientists, eager to look into the world around them. Helping them enjoy science can be easy ;there’s no need for a lot of scientific terms or expensive lab equipment. Yo...
A.
tell their children stories instead of reciting facts
B.
offer their children chances to see things for themselves
C.
be patient enough when their children answer questions
D.
encourage their children to ask questions of their own
【单选题】阅读下面短文，掌握其大意，然后从每小题所给的A.B.c、D四个选项中，选出可以填入空白处的最佳选项。Once there was a grasshopper(蚱蜢), who was the best hopper(跳跃者) in the world. She taught other grasshoppers how to hop. Soon all grasshoppers were hopp...
A.
angry
B.
relaxed
C.
stressed
D.
proud
【单选题】下列食物链中，假设蚱蜢与鼠从生产者获得的能量数值相同，那么，哪一条食物链提供给猫头鹰的能量最多？（ ）
A.
绿色植物→蚱蜢→蜘蛛→蜥蜴→蛇→猫头鹰
B.
绿色植物→鼠→猫头鹰
相关题目：
【单选题】Children start out as natural scientists, eager to look into the world around them. Helping them enjoy science can be easy ;there’s no need for a lot of scientific terms or expensive lab equipment. Yo...
A.
tell their children stories instead of reciting facts
B.
offer their children chances to see things for themselves
C.
be patient enough when their children answer questions
D.
encourage their children to ask questions of their own
【单选题】阅读下面短文，掌握其大意，然后从每小题所给的A.B.c、D四个选项中，选出可以填入空白处的最佳选项。Once there was a grasshopper(蚱蜢), who was the best hopper(跳跃者) in the world. She taught other grasshoppers how to hop. Soon all grasshoppers were hopp...
A.
angry
B.
relaxed
C.
stressed
D.
proud
【单选题】下列食物链中，假设蚱蜢与鼠从生产者获得的能量数值相同，那么，哪一条食物链提供给猫头鹰的能量最多？（ ）
A.
绿色植物→蚱蜢→蜘蛛→蜥蜴→蛇→猫头鹰
B.
绿色植物→鼠→猫头鹰
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