Exercise Answer the following questions.
1. What do you mean by levels of professions?
2. What elements make professions of different levels?
3. Make a list

of different professions and state their levels.
What kinds of professions do the people of your locality follow? Make a list
4
Prosed Work
What is called level of profession? What factors make a profession basic,
medium and high level? Discuss and write.

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.

answer: ice crystals in air

the water from the water body or another source of water gets evaporated as water vapor as an effect of heat on water. these water vapor rises in the upper layers of the earth atmosphere under high atmospheric pressure. the atmospheric pressure of these water molecules starts to decrease due to the effect of cold air. the invisible water vapor condenses into visible water droplets and ice crystals.these ice crystals and water droplets being less denser than the surrounding air floats on air as clouds.

if you look up in the top right corner you'll see your current profile picture, click than click "view profile" you'll be able to change it there.

condenser is used to focus in the light microscope.