Biology Multiple Choice from Grade 10 Unit 4 and 5
1. Which of the following is a function of the internal structures of leaves?
a) To absorb water and minerals
b) To produce oxygen
c) To carry out photosynthesis
d) To protect the plant from predators
2. What is the importance of light, chlorophyll, and carbon dioxide for
photosynthesis?
a) They provide energy for the plant
b) They help balance the concentrations of oxygen and carbon dioxide
in the atmosphere
c) They help regulate plant growth
d) They help transport nutrients throughout the plant
3. What is the process by which plants convert carbon dioxide and water into
carbohydrates?
a) Germination
b) Photosynthesis
c) Respiration
d) Transpiration
4. Which of the following is a type of tropism in plants?
a) Phototropism
b) Geotropism
c) Hydrotropism
d) All of the above
5. What is apical dominance in plants?
a) The ability to grow towards light sources
b) The tendency for lateral buds to remain dormant when an apical bud
is present
c) The ability to absorb water and minerals from soil
d) The tendency for roots to grow downwards due to gravity
6. Which hormone promotes cell elongation in plants?
a) Auxin
b) Gibberellin
c) Cytokinin
d) Ethylene
7. What is a food storage organ in plants?
a) Stems
b) Leaves
c) Roots
d) Flowers
8. How does sunlight influence plant growth?
a) It provides energy for photosynthesis
b) It helps regulate hormone production
c) It helps transport nutrients throughout the plant
d) All of the above
9. What is the importance of photosynthesis in agriculture?
a) It helps plants grow faster
b) It provides oxygen for animals
c) It produces food for humans and animals
d) It helps regulate the Earth's climate
10. What is the difference between dicots and monocots?
a) Dicots have one cotyledon while monocots have two
b) Monocots have one cotyledon while dicots have two
c) Dicots are only found in tropical regions while monocots are found
worldwide
d) Monocots are only used for ornamental purposes while dicots are
used for food