Apex domains cannot have CNAME records.
Question and response
Question
dig scinet.uz. NS
Answer
scinet.uz. 5 NS ns08.uzsci.net.
scinet.uz. 5 NS ns01.uzsci.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0