Question

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6. What is meant by metamorphosis?
Give the reason
1. Drin king water is called potable water
2. Why pituitary gland is called growth of master gland
3. Why unicellular organisms are called one celled body
4. Sodium and potassium are stored in kerosene
5. Copper cannot displace zinc from its salt solution
Answer the following question in 2-3 sentences
1. Write a note on cytoplasm
2. Describe two methods of irrigation which conserve water
3. Explain the sex determination in the unborn baby?
4. What are the weeds? How can we control them?
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Answer 1

Answer:

2. Because it releases all hormones which are essential for growth

3. Cause it only contains a single cell

4. As they are highly reactive and starts burning in air

5. As copper is lower than zinc in reactivity series

3. For gender determination chromosomes are useful if baby is xx then it's a girl while xy is boy

4. Weed is unwanted plants grown along with crop... To remove them weedicides are used

Answer 2

Answer:

portable water ,also known as drinking water comes from surface and grond source and is treated to levels that meet state fedaeral stands for consumption.drinking raw untreated water can. cause gastrointestinal problems such as diarrhea, vomiting or fever.