Normal members of a particular species all have the same number of chromosomes. How many chromosomes are found in the cells of human beings?

Human beings deprived of all sources of a particular vitamin will enventually suffer from disease symptoms specific to that vitamin. Among the following which pair is incorrect?

Among the following infectious disease listed which one is not a viral disease?

Which one of the following items is not normally an important requisite for agriculture?

Fertilizers typically provide in varying proportion, the three major plant nutrients. Which of the following is not among the major plant nutrients provided by fertilizers?

Among the following acid food item pairs. Which pair is incorrectly matched?