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Subject:

science-biology

Class:

class VII

Key Concepts

modes on nutrition, photosynthesis,structure of plant cell, symbiotic association

essential questions

1. How do we know plants make their own food?
2. Why can we as humans not make food from carbon dioxide, water and sunlight?
3. How do water and mineral absorbed by roots reach the leaves?
4. Why do leaves only make food and not any other part of the plant does not?
5. How do we come to know that leaves make food for the plant?
6. What would happen if stomata closed completely at night?
7. Why are parasitic plants called plants when they are dependent on others for foods?
8. How are nutrients replenished in soil by crop rotation?

Remembering:

  1. Which of the following is insectivorous? a) Mushroom  b) Cuscuta c) Mucor  d) Nepenthes
  2. Which of the following statement is true about croton plants? a) they donot contain chlorophyll  b) they are dark red in color because they depend on other plants for food  c) they have chlorophyll but is hidden by dark red color pigments  d) they are parasites
  3. Which of the following statement is/ are NOT true about photosynthesis :                                                                                                                        P- carbon dioxide is essential for photosynthesis to take place                                                                                                                                          Q– The product of photosynthesis are simple sugar                                                                                                                                                              R– It occurs in  the green leaves of plants                                                                                                                                                                                     S– sunlight is not used as an energy sources by the plants                                                                                                                                                   a) P and S  b) Q, R and S  c) P Q, R only  d) P,Q,R and S
  4. The equation given below represents photosynthesis :    X + water (sunlight & cholorophyll)→ Glucose + Y      a) X- oxygen  Y- carbon   b) X- oxygen  Y- carbon  c) X- carbon dioxide   Y- Hydrogen  d) X- oxygen  Y- carbon dioxide
  5. Which part of the leaf controls the rate of loss of water to the air: a) midrib  b) stomata c) vascular bundles d) veins
  6.  What role does the insect play in the insectivorous plant: a) fertilization process b) provides nutrients to the plant  c) dispersal of seeds  d) provides carbon dioxide to the plant
  7. Which structure in the plant controls the opening and closing of stomata: a) guard cells  b) mesophylls c) phloem d) xylem

understanding:

  1. What is the aim of the given experiment?   

a) To show that air is a basic need of plants  b) to show that food is a basic need of plants  c) to show that water is a basic need of plants  d) to show that sunlight is a basic need of plant

2.  Which labelled arrow represents the movement of water?        a) P  b) Q   c) R  d) none

3.  Which of the following words can complete the given table :                                                                                                                                                   Organism                                 Mode of Nutrition                                                                                                                                                                                          Cuscuta                               P                                                                                                                                                                                                                           Q                                    Insectivorous                                                                                                                                                                                                          R                                   saprophytic

a) P- parasitic   Q- mosquito   R- algae     b) P- autotrophic  Q- Mushroom  R- yeast    c) P- Parasitic  Q- Nepenthes   R- Mould   d) P- autotrophic  Q- Mushroom  R- yeast

4. What is the principal source of energy input to biological systems: a) carbon from plants b) light from the sun c) nutrients from the soil  d) oxygen from air

5. What is the main function of cholorophyll a) to absorb carbon dioxide from the atmosphere b) to absorb water and minerals from the soil  c) to give greenish color to the leaves  d) to trap sunlight

 

 

Application:

  1. Which of the following types of nutrition is exhibited by the figure given below:     a) autotrophic nutrition  b) saprophytic nutrition c) parasitic nutrition d) symbiotic nutrition
  2.  Where does maximum transpiration happen:       a) P    b) Q    c) R     d) None
  3.  Where does most of the water for photosynthesis come from: a) from the soil through the root of the plant  b) from air through tiny pores in the leaf c) as the process of respiration from the leaf d) from water vapor in the air
  4. Amarbel is an example of:  a) autotroph b)paratise  c) insectivorous d) host
  5.  Function of root nodules in leguminous plants: a) store food  b) provide extra strenght  c) perform photosynthesis d) give shelter to bacteria

Analysis:

  1. In Nepenthes plant, leaves are modified into which of the following structures: a) leaf tendrils for mechanical support b) spines to reduce the loss of water c) pitcher to trap the insects  dd) fleshy leaves to store the food and water
  2. Function of bacteria present in the roots of bean plants: a) break down nitrates into nitrogen  b) converts ammonium salts into nitrogen c) converts nitrogen into nitrates d) converts nitrates into ammonium compounds
  3. A plant that has both autotrophic and heterotrophic mode of nutrition: a) sundari plant b) rhizobium  c) amarbel d) pitcher plant

Evaluation:

Examine the following statements carefully and decide if Assertion A and reason R are individually true and if so whether the reason is a correct explanation of the assertion:

  1. Assertion A:  Lichens are example of symbiotic association between fungi and algae.   Reason R: Fungus and algae provides shelter, water and minerals to each other.                                                                                                                                                                                                            a) Statement 1 is correct while statement 2 is incorrect   b) Statement 2 is correct while statement 1 is incorrect  c) Both are correct  d) Both are incorrect
  2.  Assertion A: Rhizobium cannot make its own food    Reason R: Rhizobium lives in roots of legumes and gets food and shelter from the plant. a) Statement 1 is correct while statement 2 is incorrect   b) Statement 2 is correct while statement 1 is incorrect  c) Both are correct  d) Both are incorrect
  3. Assertion A:  Chlorophyll is required for photosynthesis. Reason R: Cholorophyl use carbon dioxide and water to synthesise carbohydrates day and night a) Statement 1 is correct while statement 2 is incorrect   b) Statement 2 is correct while statement 1 is incorrect  c) Both are correct  d) Both are incorrect
  4. Assertion A: Photosynthesis in desert plants happens in green stems only. Reason R: Leaves in desert plants are reduced to spine like to reduce the loss of water by transpiration. a) Statement 1 is correct while statement 2 is incorrect   b) Statement 2 is correct while statement 1 is incorrect  c) Both are correct  d) Both are incorrect
  5.  Assertion A:  Insectivorous plants are called so because they eat insects. Reason R: Insectivorous plant does not carry out photosynthesis, therefore it traps insects.  a) Statement 1 is correct while statement 2 is incorrect   b) Statement 2 is correct while statement 1 is incorrect  c) Both are correct  d) Both are incorrect
  6. Assertion A: Stoma is surrounded by guard cells. Reason R: They are known as guard cells because they protect the plant from losing excess water. a) Statement 1 is correct while statement 2 is incorrect   b) Statement 2 is correct while statement 1 is incorrect  c) Both are correct  d) Both are incorrect

Create: