Unseen passage more important for 10th class

Biosphere reserves are more important than the national parks and the wildlife sanctuaries. Why?

Which is more important for water pollution-

Are some essential elements more important than others? Explain.

In a class, 5% of the boys and 10% of the girls have an IQ of more than 150. In this class 60% of the students are boys. If a student is selected at random and found to have an IQ of more than 150, find the probability that the student is a boy.

Which of the two do you think is more important contributor to the resonance hybrid ?

In a frequency distribution, the mid values of a class is 10 and width of the class is 6 . The lower limit of the class is

Why are phytoplanktons more important in pond ecosystem than larger plants?

Why is aerobic degradation more important than anaerobic degradation?