Biology

Q 1. Ozone hole refers to A)decrease in the ozone layer in troposphere B)decrease in thickness of ozone layer in stratosphere C)hole in ozone layer D)ncrease in the thickness of ozone layer in troposphere Answer : Option B Explanation: No answer description available for this question. Q 2. How much blood is in the human body? A)7 liters B)5 liters C)6 liters D)4 liters Answer : Option A Explanation: The average human carries about 192.7 ounces (5.7 liters) of blood. Altogether, this quantity of blood circulates through the body twice a minute. Q 3. What we call when decrease in red blood cells? A)Polycythemia B)Jaundice C)Hemophilia D) Anemia Answer : Option D Explanation: No answer description available for this question. Q 4. Pollination is best defined as A)germination of pollen grains B)growth of pollen tube in ovule C)transfer of pollen from anther to stigma D)growth of pollen tube in ovule Answer : Option C Explanation: No answer description available for this question

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