Which one among the following animals is a mammal?

Solutions of three enzymes were prepared namely lipase, trypsin and amylase, in order to remove stains from a piece of cloth. Out of these three enzyme solutions, only lipase could completely remove the stain. This indicates that the stain was due to

From which part of turmeric, is the turmeric powder obtained?

Which one among the following animals does not undergo periodic moulting of their external body covering?

Presbyopia is a visual defect caused by

Which one among the following is not a factor that affects direction of wind?