Xerophthalmia is caused due to the deficiency of vitamin ________.

In biological terms, _______ is a relationship between two organisms in which one organism benefits and the other is unaffected.

Red worms have a structure named ______ which helps them in grinding their food.

Which of these words refers to the scientific study of domestic dogs?

Which one of the following is the process involved in photosynthesis? 

Which of the following statements is/are correct regarding the vegetative propagation of plants? 

(1). Vegetative propagation produces a clonal population. 

(2). Vegetative propagation helps in eliminating the virus. 

(3). Vegetative propagation can be practiced most of the year. 

Select the correct answer using the code given below. 

Which of the following is a root ? 

What causes hoof and mouth disease in animals?