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Subject:

science-biology

Class:

class VI

Key Concepts

climbers, conduct, creepers, fibrous roots, herbs, lamina, lateral roots, midrib, ovule, parallel venation, petal, sepal, petiole, photosynthesis, pistil, reticulate venation, stamen, shrubs, taproot, transpiration, tree, veins

essential questions

1. How do we classify plants on the basis of their stems and leaves?
2. How do plants obtain water and nutrients needed for survival?
3. How do plants minimize water loss through their leaves?

Remembering:

  1. What are weeds?
  2. Define transpiration.
  3. A wheat plant belongs to the category of: a) herb  b) shrub  c) tree  d) none of these
  4. How many whorls are there in typical flower: a) 1  b) 2  c) 4  d) 3
  5. Fill in the blanks:
    1. Tap roots are also known as ____ roots.
    2. Adventitious roots arise from parts of the plants other than the _____
    3. Onion roots are example of _________
    4. When the seed germinates ________ comes out first from the seed coat.
    5. Roots naturally grow downwards and are therefore positively________
    6. Plants store food in leaves, stems and fruits in the form of_______
    7. The part of a plant that grows toward the gravity ( positive geotropic) and water under the ground constitutes: a) root system  b) shoot system  c) any of these
  6. Identify the type of roots present in it : a) fibrous root   b) tap root   c) adventitious roots
  7. As the flowers have stalk, leaves too have stalk. What is the other name given to the stalk of the leaves that connects the leaf blade to the stem:  a) pedicel  b) peduncle  c) petiole
  8. What is the other name given to the stem of this plant? a) tuber  b) rhizome  c) bulb
  9. When the pollination occurs within the same flower, it is known as: a) cross pollination b) self pollination  c) none of these
  10. The ability of plants to grow into new plants from various vegetative structures is known as vegetative propagation. Identify the vegetative structures of a plant. a) stem  b) flowers  c) roots  d) leaves  e) fruits
  11. Which of the following plants have tendrils: a) rose  b) passion flowers  c) grapevine  d) jasmine  e) water lily e) sweet peas
  12. Identify  and write  names of  different the parts of a flower:
  13. True or false:  a) Xerophytic plants have spines. These spines are leaves    b) Tendrils are thin like structure found in weak plants and are part of the stem   c)The scales of the onions are the leaves and they store food.  d) Australian acacia leaf petiole is modified to perform the function of leaf   e) Epicalxy is the outermost whorl in a flower   f) Stamens are part of androecium the female part of the flower   g) Pistil hold the ovary, stigma and style    h) Corolla is made of petals   i) Roots can grow under the ground as well as above the ground also  j) Mango, pine and Sheesham are examples of the plants in which taproots are present   k) The roots that grow from the lower portion of the stem to give additional support to the plant are known as stilts roots

 

understanding:

  1. Write the difference between creepers and climbers.
  2. Write the difference between reticulate and parallel venation
  3. Explain the role of stem and leaf in a plant in detail.
  4. Write the difference between fibrous roots and tap root.
  5. Write the difference between stamen and pistil
  6. Write the difference between ovule and ovary.
  7. Draw a labeled diagram of a various parts of a flower.
  8. Put the following in their respective categories: beetroot, onion, grass, marigold, dandelion, potato, banyan tree, Coconut palmTap Root                Fibrous root     Adventious roots
  9. How are herbs different from shrubs?
  10. Plants like pumpkin, watermelon grows along the ground. They have weak stems. Depending on the type of stems they are classified as: a) climbers   b) creepers   c) shrubs
  11. In plants of gourd and cucurbita, some thread like structures arise from the stem that helps the plants to climb. These structures are called: a) leaf tendril  b) thorns  c) spines   d) stem tendrils
  12. The water is released: a) by plants into air by process of transpiration  b) through leaves in the from of water vapor  c) both of the above  d) none of the above
  13. A pistil consists of : a) ovary   b) ovary and style  c) ovary and stigma  d) ovary, style and stigma
  14. To test the presence of starch, why is leaf covered with spirit: a) to kill the leaf   b) to dissolve chlorophyll  c) to remove starch  d) none of the above
  15. Match the following plants stems under the various categories:
    1. Ginger & turmeric           i) Thorns & prickles
    2. Onions                               ii) stem tendrils
    3. gladiolus                            iii) Corm
    4. potatoes                             iv) offset
    5. mint, chrysanthemum    v) sucker
    6. grape vine                          vi) bulb
    7. rose & bougainvillea        vii) Rhizome

Application:

  1. In plants like raddish, carrot, sweet potato, etc, the roots are modified and the extra food is stored inside it. The roots become fleshy due to accumulation of food and the extra food is utilized by the plant whenever required. Such roots are known as: a) prop roots  b) stilt roots  c) tuberous roots
  2. It is a specialized, twisted part of a plant. Often a modified stem that coils or winds around the object like wire or pole to give support to the plants. Identify the part labelled “X” :  a) tendrils  b) nodes c) internodes
  3. What is the other name given to the stem of this plant? a) tuber   b) rhizome  c) ) bulb
  4.  Sugarcane plant has fibrous root system, which type of venation is likely to be present in its leaves? a) reticulate venation b) parallel venation  c) none of these
  5. Maize plant has fibrous root system, which type of venation is likely to be present in its leaves? a) reticulate venation b) parallel venation  c) none of these
  6. Reena observed the leaves of mango tree and found that veins on the leaves are arranged in a net like pattern. What kind of leaf venation pattern was observed by her? a) reticulate  b) parallel  c) none of these
  7. Which of the following is NOT an example of climbing roots: a) Money plant b) Dodder  c) black pepper
  8. ______ of this plant are modified as_____ to protect the plant from being eaten by other animals. a) Leaves, thorns b) leaves, prickles c) Stems, prickles
  9. Aloevera is small sized plant with soft stems. Thus depending on its size and stems, what kind of plant is it:  a) herb  b) shrub  c) creeper

Analysis:

  1. See the leaf given and choose the correct option  Statement1: This leaf has parallel venation. Statement 2: The plant has a monocot seed. a) Both Statement 1 and statement 2 are correct  b) Only statement 1 is correct  c) Only statement 2 is correct   d) None of the above
  2. Which of the following statement is INCORRECT? a) transpiration helps in keeping the leaves cool   b) transpiration helps the plant in preparing their food   c) transpiration helps in the transport of nutrients within the plant
  3. Which of the following statements are INCORRECT:  a) Maize and wheat are plants with fibrous root  b) Tulsi plant has soft green stem. It is a herb  c) Money plant is climber as it has weak stem and needs support to stand  d) Potato is an underground root
  4. Find the odd one out: a) ovary, style, stigma  b) filament, anther, pollen  c) beetroot, potato, carrot  d) potato, carrot, radish
  5. Assertion A: Trees are plants which are very tall. They have a hard and thick brown stem. Reason R: Lamina is thin, flat, broad, green part of leaf  a) Both A and R are true and R is the correct explanation of A  b) Both A and R are true but R is not the correct explanation of A  c) A is true but R is false  d) A is false but R is true
  6. Assertion A: Plants release a lot of water in to the air through the process of transpiration   Reason R: The water is released through the leaves in the form of water vapor  a) Both A and R are true and R is the correct explanation of A  b) Both A and R are true but R is not the correct explanation of A  c) A is true but R is false  d) A is false but R is true
  7. Assertion A: The parts of a typical flower are sepals and petals only. Reason R: The parts of stamen are filament and anther a) Both A and R are true and R is the correct explanation of A  b) Both A and R are true but R is not the correct explanation of A  c) A is true but R is false  d) A is false but R is true

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