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CBSE->Plus 2 Biology Science Questions

Total Questions 190
when a glass rod is rubbed against fur gets -ve charge because of gaining electrons from glass rod?why fur is considered -vely charged?
TWO HEATER MADE UP OF SAME MATERIAL ARE CONNECTED ACROSS IN PARALLEL ACROSS THE MAINS.THE LENGTH AND DIAMETER OF THE WIRE OF ONE OF THE COIL ARE DOUBLE THAN THE OTHER WHICH ONE OF THEM WILL PRODUCE MORE HEAT AND WHY?
how to test ph of a bath soap by titration?is there any other easy method to find the ph of soap?
I WANT TO DO A INVESTIGATORY PROJECT.I HAVE CHOSEN THE TOPIC TESTING OF ALKALINITY IN SOAP.CAN YOU SUGGEST ME HOW TO DO IT IN THE LAB?
what is actually inverse of matrix?how to find it? please explain briefly?
WHY SCALAR PRODUCT IS NOT ASSOCIATIVE
WHAT IS PROJECTION OF ONE VECTOR ON THE OTHER?
WHAT IS THE DIFFERENCE BETWEEN SURGERY AND OPERATION ?
Why is maths important for our daily life ?
TELL ME MORE ABOUT ALS DISEASE?
WHY FEBRUARY HAS 29 DAYS IN LEAP YEARS?
WHICH CAME FIRST EGG OR HEN ?
WHY A PREGNANT WOMEN VOMITS?
WHAT IS IQ. HOW DOES IT DIFFER IN EVERY INDIVIDUAL? CAN ANY NORMAL PERSON HAVE BRAINS AS STEFAN HAWKING?
WHY DO PERIODS LAST FOR 7 DAYS ? ON WHICH DAY DOES THE EGG RELEASES FROM OUR BODY DURING PERIODS?
WHY DOES INFERTILITY IN HUMANS HAPPEN?
WHY IS GRAVITATION ZERO AT THE CENTER OF THE EARTH ?
WHY DO HICUPS COMES?
WHAT IS OOGENESIS ? WHAT IS THE ROLE OF POLAR BODY ?
WHAT ARE fOLLICULAR PHASE AND LUTEAL PHASE IN MENSTRUAL CYCLE ?