Cattle husbandry is done for the following purposes:
$(i)$ Milk production
$(ii)$ Agricultural work
$(iii)$ Meat production
$(iv)$ Egg production

"Crop Protection Management is both a pre-harvesting and a post-harvesting affair". Illustrate the statement with suitable examples.

An Italian bee variety $A. mellifera$ has been introduced in India for honey production. Write about its merits over other varieties.

The ration (daily food requirement) for broilers is carbohydrate-rich with adequate minerals.

$(a)$ $A$ farmer wants to harvest more than two varieties at a time from his crop field. He has no idea about the cropping patterns. Suggest one method to get the desired result. Also,state three advantages of this cropping pattern.
$(b)$ Name any two fodder crops.

During class,Ravi's teacher was teaching about Thomson's model of an atom,stating that an atom is electrically neutral,i.e.,it contains equal positive and negative charges,and that an atom consists of a sphere of positive charge in which electrons are embedded like plums in a pudding. Ravi wondered how his teacher related Thomson's model of an atom to a plum pudding,and he imagined that just as dry fruits are embedded in a Christmas pudding,electrons are embedded in a sphere of positive charge.
$(a)$ According to you,what kind of qualities does Ravi possess?
$(b)$ What are the limitations of Thomson's model?