正确答案: B

无配子生殖

题目：由助细胞、反足细胞或极核发育成胚称( )。

解析：B

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举一反三的答案和解析：

[单选题]团藻的细胞为衣藻型。( )

正确

[单选题]One of the most important questions they had to consider was( ) of public health

that

[单选题]22_____

forced

[多选题]下列真菌孢子中，是二倍体的是( )。

卵孢子

接合孢子

解析：BC

[多选题]属于罂粟科的特征是( )。

植株常有黄、白色乳汁

雌蕊心皮合生，侧膜胎座

雄蕊多数

蒴果瓣裂或孔裂

解析：ABCD

[单选题]What do you mean, there are only ten tickets? There _________ be twelve.

should

[单选题]At what time of the school term does the comversation most probably take place?

At the beginning of it.