EXERCISES A. Supply appropriate end punctuation for the following sentenc the reason for each mark. 1. In which direction were the birds flying 2. She asked me if I had a car 3. How far is it from Baghdad to Mosul? 4. I wondered why he was running down the street 5. Do you know where I can find a hammer? 6. The boy would not say when he had last seen his father 7. What a lot of luggage you've brought 8. How absurd it is to think that mankind is perfect а.

The troposphere gets warmer as altitude increases.

answer: - b cells

explanation: -

there are many types of white blood cells present in our body. one such class of white blood cells are the lymphocytes. the b cells belong to the lymphocyte class of wbcs. the b cells perform their action against the pathogen by producing specialised proteins called as antibodies. these antibodies are produced as and when the b cells encounter pathogens in response to the antigens present on the surface of the pathogen. these antibodies bind to the antigens present on the pathogen and then, target them for destruction by other cells of the immune system.

so, the b cells mediate their action by identifying the antigens present on the surface of the pathogens and then producing antibodies in return to mediate its effect.

It is platinum in the market value

Succulents are the type of plant. like a cactus.