$A$ : Many countries have banned the use of antibiotics in the cattle feed.
$R$ : Dairymen give antibiotics in the feed to the cattle and it becomes breeding grounds for the antibiotic resistant bacteria
Assertion and Reason both are correct and also correct explanation.
Assertion and Reason both are correct but not explanation of assertion.
Assertion is correct, but Reason is incorrect.
Both Assertion and Reason are incorrect.
A population splits into two or more groups and these groups occupy the different ecological zones. This is known as
Simple one-celled cyanobacteria like organisms appeared on earth
Which of the following example of variation is not important from an evolutionary standpoint?
For a long time it was believed that life came out of decaying and rotting matter like straw mud, etc.
This was the theory of