Chapter Exam

Chapter 10: Life Processes in Plants — Online MCQ Test

Q: Which part of a plant mainly absorbs water and minerals from the soil?

Answer: B. Roots — Roots absorb water and minerals from the soil through root hairs. They also help anchor the plant.

Q: The green pigment present in leaves that helps in photosynthesis is called:

Answer: A. Chlorophyll — Chlorophyll traps sunlight needed for photosynthesis. It is found in the chloroplasts of green plant cells.

Q: A plant kept in sunlight grows better than the same plant kept in darkness because sunlight helps in:

Answer: B. Photosynthesis — Sunlight is needed for photosynthesis, the process by which plants prepare food. Plants in darkness cannot make enough food.

SCIENCE (CURIOSITY) · CLASS 7th · Karnataka State Board

Practice Chapter 10: Life Processes in Plants with a free chapter-wise online MCQ test for Karnataka State Board CLASS 7th SCIENCE (CURIOSITY). This chapter covers: Photosynthesis Respiration Transpiration Xylem Phloem Reproduction Pollination Germination Nutrient transport. AI-generated questions from basic to board-exam level, with instant results and explanations.

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Chapter 10: Life Processes in Plants — Important Questions & Answers (FAQ)

Frequently asked questions from Karnataka State Board CLASS 7th SCIENCE (CURIOSITY) — Chapter 10: Life Processes in Plants, with answers and explanations. These are sample questions; the exam has its own separate question set.

Which part of a plant mainly absorbs water and minerals from the soil?

A. Leaves
B. Roots ✓
C. Flowers
D. Fruits

Answer: B. Roots
Roots absorb water and minerals from the soil through root hairs. They also help anchor the plant.

The green pigment present in leaves that helps in photosynthesis is called:

A. Chlorophyll ✓
B. Carotene
C. Starch
D. Xylem

Answer: A. Chlorophyll
Chlorophyll traps sunlight needed for photosynthesis. It is found in the chloroplasts of green plant cells.

A plant kept in sunlight grows better than the same plant kept in darkness because sunlight helps in:

A. Respiration only
B. Photosynthesis ✓
C. Transpiration only
D. Seed dispersal

Answer: B. Photosynthesis
Sunlight is needed for photosynthesis, the process by which plants prepare food. Plants in darkness cannot make enough food.

A potted plant is kept near a window, and after a few days its leaves become droopy during a hot afternoon. What is the most likely reason?

A. The plant has made too much food
B. Water loss by transpiration is faster than water absorption ✓
C. The roots are producing pollen
D. The phloem is carrying oxygen away

Answer: B. Water loss by transpiration is faster than water absorption
On hot days, transpiration increases and the plant may lose water faster than roots can absorb it. This can make leaves droop.

Which statement is correct about pollination and fertilisation in flowering plants?

A. Pollination is the transfer of pollen; fertilisation is the joining of male and female cells ✓
B. Pollination is the formation of seeds; fertilisation is seed dispersal
C. Pollination happens after fertilisation
D. Fertilisation occurs before pollen is transferred

Answer: A. Pollination is the transfer of pollen; fertilisation is the joining of male and female cells
Pollination is the transfer of pollen from anther to stigma. Fertilisation happens later when the male and female cells fuse.