Class 5 Science Lesson 5 Note
#Unit -5 Life Process
Exercise
1. If the statement given below is correct, put a tick mark (✓) and if it is wrong, put across mark (x):
(a) In the absence of oxygen, living organisms cannot obtain energy from food. (✓)
(b) During respiration, plants take in carbon dioxide and release oxygen. (✗)
(c) The process by which living organisms produce offspring like themselves is called reproduction. (✓)
(d) Fish takes oxygen dissolved in water. (✓)
(e) Plants discharge resin and latex from the leaves. (✗)
2. Fill in the blanks with the appropriate words:
(a) Living organisms take in oxygen and release carbon dioxide in the process of respiration.
(b) Animals like fish and frogs reproduce by laying eggs in water.
(c) The process of loss of excess water from plant leaves is called transpiration.
(d) Plants take in carbon dioxide and release oxygen in photosynthesis.
(e) Generally, transportation in an animal’s body is done by blood.
3. Choose the correct option:
(a) What do insects breathe through?
👉 i. spiracles ✅
(b) What is the process of disposing of unwanted substances by living beings called?
👉 iv. excretion ✅
(c) Which of the following is an organism that reproduces by giving birth to offspring directly?
👉 iv. cat ✅
(d) Generally, from which part of the plant does the process of transpiration take place?
👉 iii. leaves ✅
(e) Why do living organisms need oxygen?
👉 iv. to produce energy from food ✅
4. Answer the following questions:
(a) What is a life process?
👉 The activities that living organisms continuously perform to survive, such as nutrition, respiration, transportation, excretion, and reproduction, are called life processes.
(b) What are the life processes in living organisms?
👉 The life processes in living organisms include nutrition, respiration, transportation, excretion, and reproduction.
(c) What does the plant excrete?
👉 Plants excrete carbon dioxide and water vapor through the leaves, and substances like resin and latex through the stem and bark.
(d) Can all the plants prepare food by themselves? Give reason.
👉 No, all plants cannot prepare food by themselves. Only green plants with chlorophyll can prepare their own food through photosynthesis. Plants without chlorophyll, like mushrooms, depend on decaying matter.
(e) Write any two differences between autotrophs and heterotrophs.
👉
Autotrophs make their own food (e.g., green plants).
Heterotrophs depend on other organisms for food (e.g., animals and non-green plants).
(f) Breathing and respiration are different things. Give your opinion.
👉 Yes, breathing is the process of taking in oxygen and releasing carbon dioxide. Respiration is the process of breaking down food inside the body using oxygen to produce energy, carbon dioxide, and water.
(g) We take medicine when we have headache, stomachache, or something else in our body. Which life process transports medicine from our stomach to the aching part? Explain it.
👉 The life process that transports medicine is called internal transportation. In animals, blood carries the medicine from the stomach to different parts of the body where it is needed.
