Mention two factors which affect food grains during storage.

Animal feed includes vitamins and proteins mainly.

Which of the following are Indian cattle?
$(i)$ $Bos$ $indicus$
$(ii)$ $Bos$ $domestica$
$(iii)$ $Bos$ $bubalis$
$(iv)$ $Bos$ $vulgaris$

After combing his hair,Sameer kept the comb on the table where some pieces of paper were lying. He observed that the plastic comb attracted small pieces of paper. He was surprised to see this and asked his teacher about it. His teacher explained to Sameer that matter contains charged particles and that an electrically charged object can attract an uncharged object. Specifically,upon rubbing with dry hair,a comb acquires an electric charge,which then attracts the pieces of paper.
$(a)$ Give any other practical application of this.
$(b)$ What kind of qualities are shown by Sameer?

Two friends,Girish and Neeraj,were discussing Newton's third law. They were perplexed about how action and reaction are equal and opposite. They could not think of an experiment by which they could ascertain this fact. Pushkar,who was their friend,told them that he would set up an experiment to prove this to them. By performing an experiment,Pushkar demonstrated the law.
$(a)$ Can you think of an experiment by which you can demonstrate this law?
$(b)$ What values do you think Pushkar has?

India is a country where three-fourths of the population is engaged in agriculture. Even though the financial conditions of some farmers allow them to adopt higher-level farming practices and improved agricultural technology,they are hesitant to use $HYV$ seeds with traits such as resistance to diseases and pests,or qualities that would result in higher yields.
$(a)$ What is meant by genetically modified crops?
$(b)$ What are the desired agronomic characters for fodder and cereal crops?
$(c)$ In your opinion,what should be done so that modern agricultural technology is adopted by most farmers?