Telangana SCERT Class 7 Science Chapter 10 Solution – Nutrition In Plants. Here in this post we provides Class 7 Science Nutrition In Plants Telangana State Board Solution. Telangana State Board English Class VII Medium Students can download this Solution to Solve out Improve Your Learning Questions and Answers.
Telanagana State Board Class 7 Science Chapter 10 Nutrition In Plants Solution:
Question 1: A potted plant is kept in light for a day and one its leaves is tested for starch. The same plant is kept in the dark for two days and another leaf is tested for starch. Will there be a difference in the results of the two experiments? Give reasons for your answer.
Ans: – Yes, there will be show a difference in the results of the two experiments.
In first case potted plant is kept in light for a day. As we know green parts of plants use carbon dioxide in the presence of sunlight (as well as other sources of light) along with water to make glucose, starch and other food materials. So in this case the potted plant does not make starch because it kept in dark, so there is no light from which help the plant make starch with the presence of light and carbon dioxide. That means effect of light has on the formation of starch in leaves.
Question 2: What happens if leaves a green plant are coated with oil?
(Hint: What will be the effect on stomata)
Ans: – The leaves have tiny holes through which the exchange of air (gaseous exchange) takes place. These holes are called stomata.
If leaves of a green plant are coated with oil, then all the stomata which present on the surface of the leaf will get blocked.
So, if stomata are blocked, there would be no air or gaseous exchange happend and it effects on photosynthesis process of green plant. May be the plant will be dies slowly.
Question 3: Do you think saprophytes help us in keeping the environment clean?
(Hint: What do saprophytes feed on?)
Ans: – After rains, we find umbrella like structure growing on dead and decaying matter. These plants are called saprophytes.
All these types of plants simply absorb organic material usually from decaying matter. It breaks down the dead and decaying organic matter into simple matter, and it can be taken up and recycled by the plants. Thus saprophytes help us in keeping the environment clean.
Question 4: Differentiate between following with some examples.
(i) Parasite and saprophyte
(ii) Host and Parasite
Ans: – (i) Parasite plants develop their special roots, which penetrate into the tissue of the host plant and observe food materials from them.
Saprophytes growing on dead and decaying matter and they absorb organic material usually from decaying matter.
Parasitic plants are depend on living host.
But saprophyte does not depend on living host.
Parasite harms the organism, but saprophytes does not harm organism because they growing on dead matter.
Parasite can be plants or animals.
(ii) The organisms from which a parasite takes its nutrients is called as host.
It is an organism that lives in or on the body of another organism and takes its nutrients from it is called a parasite. It absorbs food materials from host.
Question 5: Fill in the blanks and give reasons
(i) Lenticels are present on ____ in plants.
Ans: – Stem.
Reasons: Lenticels are present on stem in the plants and it helps in the gaseous exchange between the atmosphere and the tissue which stays in the stem.
(ii) The food synthesized by the plants is stored as _____
Reasons: Green plants use carbon dioxide in the presence of sunlight to make starch, and other food materials.
(iii) Saprophytes depend on _________ for food.
Ans: – Saprophytes growing on dead and decaying matter and absorb organic material from decaying mater as their food.
Question 6: Name the following
(i) Pores through which leaves exchange gases.
Ans: – The pores through which leaves exchange gases are called Stomata.
(ii) Plants that act as scavenger of nature.
Ans: – Saprophytes.
(iii) Those plants that share food and shelter.
Ans: – lichen and fungus.
(iv) Plants which cannot make their own food and obtain it from host.
Ans: – Parasite, or Hetrotrophs.
Question 7: Tick the correct answer
(i) Cuscuta is an example of
Ans: – (b) Parasite
(ii) Hautoria are
Ans: – (a) Root
(iii) Raw materials involved in the process of photosynthesis
Ans: – (d) all of them
Question 8: Circle the insectirous plant among the plants given below
Ans: – (c) Nepanthis
Question 11: Why are some plants called insectivorous plants? Give reasons/
Ans: – Droseras, Uticularia, Venusflytrap are some examples of insectivorous.
This plants manufacture their own food but obtain a part of their nutrition from insect. Leaves of these plants trap insectects. These plants grown in areas deficient in nitrogen. Hence they meet their nitrogen requirements from insects. That’s why these plants are called insectivorous.
Question 14: Prathima sais “Mushroom is also a plant” is she correct? How would you supports her?
Ans: – Mushroom is fungi. Mushrooms contain no crosophy . Most of them are known as saprophytes. So Mushrooms are not plants. They obtain their nutrition from non living organic matter.
Hence, we can say Mushroom is not a plant, because they can’t make their own food and it does not contain chlorophyll.
Question 15: Photosynthesis is the way plants make food in every leaf by using different items. Write your fellings on this.
Ans: – Plants make their own food with the help of photosynthesis in the presence of sunlight and cabon dioxide water. BY this photosynthesis process the plants get their nutrition, and they full fill their needs. By this process they can grow. So I thing its great that god made the impossible thing possible by making the plants make their own food. Plants have this ability to fulfil their need. That really appreciating.
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very nice questions and answers super