Full-form of ATS In Biology

Q. I have an exam on 8 October. How can I revise the biology because there are a lot of names in it. Should I read the full chapters again ?

Q. 'Carbon forms backbone of biology of life on earth'. Justify.

Q. Name the branch of biology that deals with - Study of prehistoric forms of life.

Q. Of the 200 students at College T majoring in one or more of the sciences, 130 are majoring in chemistry and 150 are majoring in biology. If at least 30 of the students are not majoring in either chemistry or biology, then the number of students majoring in both chemistry and biology could be any number from

Q. In a college, $60$ students enrolled in chemistry, $40$ in physics, $30$ in biology, $15$ in chemistry and physics, $10$ in physics and biology, $5$ in biology and chemistry. No one enrolled in all the three. Find how many are enrolled in at least one of the subjects.