Answer Science Students
 

Give Scientific Reasons
Why Do Birds Not Urinate????????????????
Why A Bee Dies When It Stings?????????
Why A North Star Always Appear In North??????????????????
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No.1
Unlike mammals (which excrete liquid fluid as urine and solid waste as feces), birds mix both liquid waste and solid waste. They dont have urninary bladder and the urea is not formed, which is an important component of urine instead uric acid is formed, which requires very less wather. In this way they cut short the high requirement of water and also by absence of urniary blader their overall weight is decreased

No.2

When the honey bee stings, she leaves her stinger and venom sac in the body and cannot survive the process as her internal body parts (viscera) get exposed to the outer body and without any skin covering she dies a horribly.

No.3

Look the night and day is actualy the rotation of earth. The part of earth which is exposed towards sun side receives sun light and we say it 'day', whereas the other side of the earth always face the area opposite to the sun, this dark area contains North star and other planets etc.

Sun ---- day ----- earth (1/2 or 3/4 of earth) ----- night ----- North Star


This is the cause that venus is only seen at dawn.