10. Answer the following:(Short answer questions)
(a) How is food prevented from entering the windpipe?
(6) List out the processes involved in sericulture.
(c) Potato and ginger are both underground parts that store food. Where is the food prepared in these
plants?
(d) A goat eats away all the leaves of a small plant (balsam). However, in a few days, new leaves could
be seen sprouting in the plant again. How did the plant survive without leaves?
(e) Why is nutrition essential for a living organism?
(f) How will you distinguish wool from cotton fibre?
(g) Nitrogen is an essential nutrient for plant growth. But farmers who cultivate pulse crops like green
gram, Bengal gram, black gram, etc. do not apply nitrogenous fertilizers during cultivation. Why?
Answers
Answer:
Answer c - They prepared their food in their lives and stor in the vegetables
Answer:
1. When you swallow, the epiglottis flattens backward to cover the entrance to your larynx and prevent food from entering the lungs and windpipe. The epiglottis returns to its usual position after swallowing.
2. Moriculture – the cultivation of mulberry leaves.
Silkworm rearing – promoting the growth of the silkworm.
Silk reeling – the extraction of silk filaments from the silkworm cocoons.
3. In potato and ginger plants, the food is stored in the underground parts. Ginger and potato are underground stems; while Potato is a tuber, Ginger is a rhizome and the food is stored in them in the form of starch though it is prepared in the leaves.
4. A goat eats away all the leaves of a small plant (balsam). However, in a few days, new leaves could be seen sprouting in the plant again. How did the plant survive without leaves? ... The plant survive because of the extra food that is stored in the stem of the plant.
5. Nutrients are chemical substances found in every living thing on Earth. They are necessary to the lives of people, plants, animals, and all other organisms. Nutrients help break down food to give organisms energy. ... The human body can also synthesize some nutrients, such as amino acids.
6. Both are natural fibers. The first basic difference is that cotton is the product of a plant and wool can be the hair from one of many animals such as a sheep, goat, etc. Secondly, cotton is a cellulose akin to paper whereas wool is a protein like our own hair.
7. Plants such as grams and pulses have a special type of bacteria in their roots which transforms atmospheric nitrogen into compound. and therefore there is no need of nitrogenous fertilizers. Therefore, farmers do not use nitrogenous fertilisers at the time of cultivation.
THAT'S YOUR ANSWER
HOPE YOU LIKE IT!