Question

If you tell all the answers properly you will get 100 Marks

I will mark you as BRAINLIEST

1. What are weeds ?
2. If wheat is sown in Sharif season what will happen?
3. Explain Winnowing
4. What are major groups of microorganisms?
5. What will happen
i. we go on cutting trees
ii. the habitat of animals is disturbed
iii. the top soil is exposed
6. Answer in brief What is RED DATA BOOK
7. What is green house effect
8. Difference between pure and polluted air.





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Answer 1

Answer:

• weeds are extra waste plants that grow near crops .and eat their nutrients
• it will get destroyed no plant will grow
• the process by which husk is remove from weeds is known as winnowing
• are microscopic organism that exist as unicellular , multicellular , cell clusture
• no tree will left on Earth of Tree are no tree their would be no oxygen and we would die
• animal habitat is destroyed than animal come to cities and even could die without food and home
• when top soil will exposed it will let yo soil erosion
• Red data book is a book of all species that exist on earth at a time , species that are no longer on earth ,and which will be extincted soon
• 1pure air is only contain a limited amount of all gases 1polluted gases doesn't have any limited amount of gas 2 pure air is healthy for all living organism 2 polluted air is unhealthy for plants all human beings and animals 3 eg pure oxygen 3eg polluted CO2 carbon dioxide
• hope it helps please mark as brainliest

Answer 2

Answer:

Threshing is the process of separating the chaff from the grains with the help of blowing air. It is either done by hand or done with the help of a thresher.

The chaff from grains is separated from the straw with the help of a thresher.

So, the correct option is ' Threshing