Tick the correct answer:
(a) Amarbel is an example of:
(i) autotroph (ii) parasite (iii) saprotroph (iv) host
(b) The plant which traps and feeds on insects is:
(i) Cuscuta (ii) china rose (iv) pitcher plant (iv) rose
(a) (ii) Parasite
An example of parasite plant is Cuscuta which is also known as Amar bail. Cuscuta plant does not contains chlorophyll that is why it is not green in colour. We can see Cuscuta plant a yellow, oragne tubular structure twining around the stems and branches of a tree. It cannot synthesise its own food because of lacking of chlorophyll. Cuscuta plant takes readymade food from the tree on which it climbs.
(b) (iv) Pitcher plant
It is a different carnivores plant which can trap insects and digest them. The pitcher-like or jug-like structure is the modified part of leaf also known as pitfall traps. The leaf's apex forms a lid which are able to open and close the mouth of the plant. Inside the pitcher there are hair which are directed downwards and inwards. When an insect falls in the pitcher, the lid get closed and the trapped insect gets entangled into the hair. The insect is then digested by the digestive juices that are secreted in the pitcher and its nutrients are absorbed. These insect-eating plants are called insectivorous plants.
Popular Questions of Class 7 Science
- Q:-
Classify the changes involved in the following processes as physical or chemical changes:
(a) Photosynthesis
(b) Dissolving sugar in water
(c) Burning of coal
(d) Melting of wax
(e) Beating aluminium to make aluminium foil
(f ) Digestion of food - Q:-
Given below is a crossword puzzle based on this lesson. Use hints to fill in the blank spaces with letters that complete the words.
Down Across
(D) 1 : Thorough washing (A) 1 : Keeps warm
2 : Animal fibre 2 : Its leaves are eaten by silkworms
3 : Long thread like structure 3 : Hatches from egg of moth
- Q:-
Sketch the cross section of soil and label the various layers.
- Q:-
Here is a crossword puzzle: Good luck!
Across
3. Liquid waste products
4. Solid waste extracted in sewage treatment
6. A word related to hygiene
8. Waste matter discharged from human bodyDown
1. Used water
2. A pipe carrying sewage
5. Micro-organisms which causes cholera
7. A chemical to disinfect water - Q:-
Take three test-tubes. Fill æth of each with water. Label them A, B and C. Keep a snail in test-tube A, a water plant in test-tube B and in C, keep snail and plant both. Which test-tube would have the highest concentration of CO2?
- Q:-
Sketch the reproductive parts of a flower.
- Q:-
Solve the following crossword puzzle with the clues given:
Across
2. Plantation prevents it.
5. Use should be banned to avoid soil pollution.
6. Type of soil used for making pottery.
7. Living organism in the soil.Down
1. In desert soil erosion occurs through.
3. Clay and loam are suitable for cereals like.
4. This type of soil can hold very little water.
5. Collective name for layers of soil. - Q:-
Describe how crystals of copper sulphate are prepared.
- Q:-
Match the items in Column I with those in Column II:
Column I Column II
(i) A home for living organisms (a) Large particles
(ii) Upper layer of the soil (b) All kinds of soil
(iii) Sandy soil (c) Dark in colour
(iv) Middle layer of the soil (d) Small particles and packed tight (v) Clayey soil (e) Lesser amount of humus - Q:-
When baking soda is mixed with lemon juice, bubbles are formed with the evolution of a gas. What type of change is it? Explain.
Recently Viewed Questions of Class 7 Science
- Q:-
Discuss why wearing more layers of clothing during winter keeps us warmer than wearing just one thick piece of clothing.
- Q:-
Which of the statements given below is correct?
(i) In winter the winds flow from the land to the ocean.
(ii) In summer the winds flow from the land towards the ocean.
(iii) A cyclone is formed by a very high-pressure system with very high-speed winds revolving around it.
(iv) The coastline of India is not vulnerable to cyclones. - Q:-
Match the words of Column I with those given in Column II:
Column I Column II
1. Scouring (a) Yields silk fibres
2. Mulberry leaves (b) Wool yielding animal
3. Yak (c) Food of silk worm
4. Cocoon (d) Reeling
(e) Cleaning sheared skin - Q:-
Explain how painting of an iron gate prevents it from rusting.
- Q:-
What are stomata? Give two functions of stomata.
- Q:-
There are ten tubewells in a lane of fifty houses. What could be the long term impact on the water table?
- Q:-
Find out the letters of English alphabet or any other language known to you in which the image formed in a plane mirror appears exactly like the letter itself. Discuss your findings.
- Q:-
List the similarities and differences between aerobic and anaerobic respiration.
- Q:-
Why does an athlete breathe faster and deeper than usual after finishing the race?
- Q:-
Name two chemicals used to disinfect water.
- NCERT Chapter