控制生物性状的最小单位是（ ）
A：细胞
B：细胞核
C：染色体
D：基因
将正确的图片和句子配对
① It's yellow. It's small. It goes “Peep,peep”.
② It's fat. It goes “Oink… oink”.
③ It's big. It goes “ Moo…moo”.
④ It's thin. It's in the tree.
⑤ It's yellow. It goes “ Quack …quack”.
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的图像关于 （ ）
