― Is Kate in, please? I want to ______ her.

― Sorry, she is out. You'd better ______ her later. [ ]

A. see; find

B. speak to; call

C. visit; ring up

D. talk to; look for

无子西瓜是由二倍体（2n=22）与同源四倍体杂交后形成的三倍体。回答下列问题：

上述杂交获得的种子可发育为三倍体植株。该植株会产生无子果实，该果实无子的原因是三倍体的细胞不能进行正常的（）分裂。