Questions

The process of conversion of milk into curd is called fermentation.  It is a chemical change. Milk consists of globular proteins called casein. As the microorganism lactobacillus react with milk and turn it to curd. For it 37 degree temperature is needed. But sometimes when it does not get favourable condition, then other microorganism react and makes the curd taste different.

The Chloroplast contains the wonder green pigment chlorophyll which is able to trap solar energy and use it for synthesis of food

Our Solution:    

  There are 3 possibilities

       Cindy: car
       Mr. Jones: train
       John: plane
       Rachel: ship

      Cindy: car
      Mr. Jones: ship
      John: plane
      Rachel: train

     Cindy: car
     Mr. Jones: ship
     John: train
     Rachel: plane

The first step in the refining of petroleum is distillation i.e,  the fractionation of crude oil in atmospheric and vacuum distillation towers.

The first process petroleum refinery is known as distillation. In this process, crude oil is heated and fed into a distillation column. As the temperature of the crude oil in the distillation column rises, the crude oil separates itself into different components, called "fractions." The fractions are then captured separately. Each fraction corresponds to a different type of petroleum product, depending on the temperature at which that fraction boils off the crude oil mixture.

In message passing, it is the condition in which, both, the sender and receiver are blocked until the message is delivered.