All living organisms need food to survive, isn’t it? Can you think of the question , where do we get food from? We have already answered this question in the lesson 1. Though we get food from plants and other animals, plants are the ultimate producers of food. Green plants are the only creatures who are capable of photosynthesis. Plants have roots, green leaves , stem, etc but animals lack all these hence animals remains as consumers while plants are producers. Let us glance through the important KSEEB solutions on Getting to know about the plants:
Answer the following questions
1. Correct the following statements and rewrite them in your notebook.
Corrected statements:
2. Draw (a) a leaf, (b) a taproot and (c) a flower you have studied for Table 7.3
Refer textbook
3. Can you find a plant in your house or in your neighborhood which has a long but weak stem? Write its name. In which category will you place it?
Answer: We have a pumpkin plant at our backyard, it has a long , thin and slender stem. It definitely needs support because it is a climber.
4. What is the function of a stem?
Answer: Stem has many functions to do but the most important , it provides support to keep a plant upright. It has a vascular ( circulatory pipes) pipes called xylem and phloem. Xylem carry water from root to shoot while phloem transport food prepared from leaves to fruit , stem or root.
5. Which of the following leaves have reticulate venation (Wheat, tulsi, maize, grass, coriander (dhania), China rose.
Answer : Among this list, Tulsi, China rose, and Coriander have reticulate venation.
6. If a plant has fibrous roots, what type of venation do its leaves have?
Answer: A plant with a fibrous root will usually has its leaves with parallel venation.
7. If a plant has leaves with reticulate venation, what kind of roots will it have?
Answer: If a plant has leaves with reticulate venation, it will have tap root systm.
8. Is it possible for you to find out whether a plant has taproot or fibrous roots by looking at the impression of its leaf on a sheet of paper?
Answer: Yes, I can guess whether a plant has taproot or fibrous roots by looking at the impression of its leaf on a sheet of paper. Because, plants with reticulate venation is seen in plants with taproots and parallel venation is found in plants with fibrous roots.
9. What are the parts of a flower?
Answer: A typical flower has sepals, petals , pistil, anthers, stigma, receptacle s and pedicles.
10. From the following plants, which of them have flowers?(Grass, maize, wheat, chilli, tomato, tulsi, peepal, shisham, banyan, mango, jamun, guava, pomegranate, papaya, banana, lemon, sugarcane, potato, groundnut)
Answer: The plants which have flowers are grass, maize, wheat, chilli, tomato, tulsi, peepal, shisham, banyan, mango, jamun, guava, Pomegranate, papaya, banana, lemon, sugarcane, potato, and groundnut.
11. Name the part of a plant which produces food. Name the process.
Answer: The green parts of a plant help in the food production . In most cases , leaves does this because leaves contain a greenish pigment chlorophyll. However, in some cases stem assists in food synthesis. Photosynthesis is the process through which food is produced.
12. In which part of a flower will you find the ovary?
Answer: The ovary is found inside the lowest part of pistil.
13. Name two plants in which one has joined sepals, and the other has separate sepals
Answer: Cotton and hibiscus has joined sepals while rose and lotus have separated sepals.
Additional questions on getting to know about plants.
1. Classify plants
Answer: plants are classified into herbs, shrubs, climbers, creepers, bushes, and trees.
2. What are herbs? Give examples.
Answer: Herbs are small plants with soft , greenish and short stems. Herbs doesn’t grow tall as they do not have a woody stem as seen in the tall trees. Examples include cinnamon, cloves.
3. What are shrubs? Give examples.
Answer: Shrubs are shorter than trees, taller than herbs. They are woody plants with multiple branches and a strong, flexible root system. Some examples include; lemon, hibiscus, rose.
4. What are climbers and creepers? Give some examples.
Answer: Climbers are branchy plants with hallow and weak steam system. So, they cannot grow up without support. Gourd, grape plants, bean stalk, and pumpkin plants are best examples of climbers. Climbers take the help of things around and coil around them with the tendrils. Creepers are the plants that spread across their stem .They tend to spread on the ground instead of climbing. Creepers are also known as runners.
5. What are insectivorous plants? Give example.
Answer: Plants that trap insects for food are called insectivorous plants. Pitcher plant and venus trap plants are some examples.
6. Can a Pitcher plant produce food by photosynthesis? If yes, then why should this plant eats insects?
Answer: Yes, it can conduct photosynthesis to produce food however, it traps insects for nitrogenous compounds. Nitrogenous compounds available in the soil are not readily absorbed by this plant.
7. Name the two systems of a plant structure.
Answer : Root system and shoot system. Root system is a complex system lie inside the soil while shoot system is aerial ( above the ground). Shoot system includes stem, branches, leaves, flowers, fruits , seeds, etc.
8. What are weeds?
Answer: Weeds are unwanted plants that grow alongside the crops. Weeds must be regularly cleaned to improve crop yield.
9. What is a stem?
Answer: Stem is an aerial part that supports plant. It is woody part and has 2 way circulatory system called xylem and phloem.
10. What are the important parts of a leaf?
Answer: Stalk or petiole, lamina, leaf blade, midrib, leaf veins, and cuticle are some important parts of a leaf.
11.What is petiole and lamina.
Answer: Leaf stalk or petiole is the part of leaf which is attached to the stem. While lamina is the broad green part of the leaf .
12. What is the main function of leaf?
Answer: photosynthesis or food synthesis is the main function of the leaf.
13. What is venation?
Answer: Venation is the pattern of distribution of veins from the midrib. Veins are the small network of lines on the leaves
14. What does midrib do in a leaf?
Answer: Midrib is a strong line found at the centre of a leaf . It holds all the thin veins together.
15. What are the types of venation?
Answer: the two main types of venation are reticulate venation, and Parallel venation.
16. Differentiate between reticulate and parallel Venation.
Answer: Reticulate venation looks a like a spider net with many small branches from mid rib while parallel Venation has its veins parallel to the midrib and they don’t form branches.
17. What is transpiration?
Answer: It is a process where leaves lose some water from their surface in the form of vapors. Transpiration is very important to pull water from the roots.
18. Define photosynthesis.
Answer: Photosynthesis is a process by which leaves prepare their food from water and carbon dioxide in the presence of sunlight and chlorophyll . Chlorophyll is a green-colored substance found in the leaves .
19. From the list of plants below classify the leaves based on the Venation pattern.(Peepal, neem, grass, mustard, methi, dhania (coriander), rose, tulsi, mango, sugarcane, maize, mint, wheat, rice).
Answer: Plants with reticulate venation are peepal, mustard, methi, dhania Tulsi, mango, mint . Parallel Venation is found in grass, sugarcane, rice, maize and wheat.
20. What is the main function of roots? Classify the root system.
Answer: Important function of the root is to absorb water and minerals from the soil. Root system is divided into main root or primary root system, lateral root system and fibrous or adventitious root system .
21.What are lateral roots?
Answer: The tiny roots branched out from the main taproot are called lateral roots.
22. What is the difference between taproots and fibrous roots
Answer : A taproot is a primary root which is usually a single root whereas while fibrous roots are a network of smaller, branched out roots from the tap roott.
23. What are modified roots?
Answer: In addition to the absorption of nutrients and water, some plants have modified roots to store food. For example , carrot, radish, sweet potato, ginger.
24. What is the function of a flower in plants?
Answer: Flower is a reproductive part that helps in sexual reproduction. It also bears fruits and seeds.
25. What does sepals and petals do?
Answer: Sepals protect the inner parts of flower while petals attract the pollinators required for reproduction .
26. What are the reproductive parts of a flower.
Answer: The reproductive parts of a flower are Stamens and pistil.
III. Fill in the blanks with appropriate words:
IV. True or False type questions:
Answers: