Life Processes Control and Coordination (Class 10)

What this worksheet covers

This is an eighteen-question practice worksheet on life processes, control and coordination for Class 10, written to the pattern of the SOF National Science Olympiad (NSO). It carries 24 marks and is designed to be attempted in 45 minutes, split across three sections — Scientific Reasoning, Applying What You Know and Achievers Section. Every question is multiple choice with exactly one correct option, and every one comes with a fully worked solution rather than just an answer key — so a child who gets one wrong can see where the reasoning went astray instead of only learning that it did.

Skills your child practises

• Applied problem-solving on life processes, control and coordination at Class 10 level
• Working accurately against a time limit, as the real paper demands
• Scientific Reasoning questions in the olympiad format
• Applying What You Know questions in the olympiad format
• Achievers Section questions in the olympiad format
• Reading worked solutions to find the step that went wrong

How to use it

1. 1There are 18 questions in this worksheet. All questions are compulsory.
2. 2Each question has four options (A), (B), (C) and (D). Exactly one option is correct.
3. 3Questions 1–15 carry 1 mark each. Questions 16–18 (Achievers Section) carry 3 marks each.
4. 4There is no negative marking. Study every diagram and table carefully.

Sample questions from this worksheet

A preview of what's inside Life Processes Control and Coordination (Class 10) — the PDF has the full set, and every question comes with a worked solution like these.

1. 1. Green plants prepare their own food by photosynthesis. This mode of nutrition is called _______.

   • AHeterotrophic
   • BAutotrophiccorrect
   • CSaprophytic
   • DParasitic
   Solution: Autotrophic nutrition means making food from simple inorganic substances using an outside energy source, here sunlight. Animals, which take ready-made food, are heterotrophic.

2. 2. Most of the water lost from a plant by transpiration escapes through the _______.

   • AStomata of the leavescorrect
   • BRoots
   • CBark of the stem
   • DFlowers
   Solution: The stomata, tiny pores guarded by pairs of guard cells, open for gas exchange, and water vapour escapes through them at the same time. Transpiration also helps pull water up the xylem.

3. 3. Assertion (A): Arteries have thick, elastic walls.Reason (R): Blood leaves the heart under high pressure and travels through the arteries in spurts.

   • ABoth A and R are true and R is the correct explanation of Acorrect
   • BBoth A and R are true but R is not the correct explanation of A
   • CA is true but R is false
   • DA is false but R is true
   Solution: Each contraction of the ventricles pushes blood into the arteries at high pressure, so their walls must be thick and elastic to withstand and smooth out those surges. Both statements are true and the high pressure is exactly why the walls are built that way, so R explains A. Veins, carrying blood at low pressure, have thin walls and valves instead.