regarding 5:103 and 6:143, 6:144

[munir rana]

Dear forum members

Salam

I shall put forward some questions here in a regular interval to make a better understanding of some verses of Holy Quran. Hope that you will help your best. If any of the questions are already answered, please give me the link.

What is the meaning of the words bahirah, saibah, wasilah, ham in the verse 5:103. Some say that these are slit-ear she camel, or a she-camel let loose for free posture, or idol sacrifices for twin births in animals, or stallion camels freed from work.
Is it ok?
5:103  Allah has not appointed (such innovations as) Bahirah or Saibah or wasilah or ham. But those who disbelieve invent falsehood about Allah, and most of them do not reason.

Also failed to understand another two verses  6:143, 6:144
6:143 (They are) eight mates of sheep, two and of the goats, two. Say, `Is it the two males forbidden or the two females or that which the wombs of the two females contain? inform me the knowkledge, if you should be truthful.'
6:144 And of the camels, two and of the cattle, two. Say, `Is it the two males He has forbidden or the two females or that which the wombs of two females contain? Or were you witnesses when Allah charged you with this? Then who is more unjust than one who invents a lie about Allah to mislead the people by (something) other than knowledge? Indeed, Allah does not guide the wrongdoing people.'

Thanks.