Class 10 Life Processes Previous Years Questions
Previous Years Questions Notes Important QuestionsLife Processes Previous Years Question
- List the steps of preparation of temporary mount of a leaf peel to observe stomata. [CBSE 2018] [2Marks]
- List in tabular form two differences between pepsin & trypsin. [CBSE 2019] [2 Marks]
- List four precautions in proper sequence which we observe while preparing a temporary mount of leaf peel. [CBSE 2019] [2 Marks]
- In the experiment of preparing a temporary mount of a leaf peel to observe stomata we use two liquids other than water. Name these two liquids & state when and why these liquids are used? [CBSE 2019] [2 Marks]
- A student has set up an apparatus to show that “CO2 is released during respiration”. After about 1 hour he observes no change in the water level in the delivery tube. Write two possible reasons for the failure of the experiment. [CBSE 2019] [2 Marks]
- Explain the ways in which glucose is broken down in absence or shortage of oxygen. [CBSE 2019] [3 Marks]
- List four functions of the human heart. Why is double circulation necessary in the human body? [CBSE 2019] [3 Marks]
- What is haemoglobin? State the consequences of deficiency of haemoglobin in our bodies. [CBSE 2019] [3 Marks]
- .
- In the process of respiration., state the function of alveoli.
- Rate of breathing in aquatic organisms is much faster than in terrestrial organisms. Give reasons.
- Complete the following pathway showing the breakdown of glucose: [CBSE 2020] [3 Marks]
- .
- Mention any two components of blood.
- Trace the movement of oxygenated blood in the body.
- write the function of valves present in between atria & ventricles.
- Write one structural difference between the composition of artery & veins. [CBSE 2018] [5 Marks]
- .
- Define excretion.
- Name the basic filtration unit present in the kidney.
- Draw excretory system in human beings & label the following organs of excretory system which perform following functions:
- form urine
- is a long tube which collects urine from kidney
- store urine until it is passed out [CBSE 2018] [5 Marks]
- Give reasons:
- Ventricles have thicker muscular walls than atria.
- Transport system in plant is slow.
- Circulation of blood in aquatic vertebrates differs from that in terrestrial vertebrates.
- During the daytime, water & minerals travel faster through xylem as compared to the night.
- Veins have valves whereas arteries do not. [CBSE 2020] [5 Marks]
- Design an activity to show that chlorophyll is essential for photosynthesis. [CBSE 2020] [5 Marks]
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