ITBS ITBS Science Concepts and Life Science 1 — Questions and Answers
Question 1: Which process do plants use to make their own food using sunlight?
- Respiration
- Photosynthesis (Correct answer)
- Digestion
- Evaporation
Correct answer: Photosynthesis
Plants use photosynthesis to convert sunlight, water, and carbon dioxide into glucose for food.
Question 2: What is the basic unit of life?
- Organ
- Tissue
- Cell (Correct answer)
- Molecule
Correct answer: Cell
The cell is the basic structural and functional unit of all living organisms.
Question 3: Which of the following is a mammal?
- Salmon
- Eagle
- Dolphin (Correct answer)
- Frog
Correct answer: Dolphin
Dolphins are mammals because they breathe air, are warm-blooded, and nurse their young with milk.
Question 4: What do plants need to carry out photosynthesis? (Select the best answer)
- Soil and salt
- Sunlight, water, and carbon dioxide (Correct answer)
- Oxygen and nitrogen
- Heat and minerals only
Correct answer: Sunlight, water, and carbon dioxide
Plants need sunlight, water, and carbon dioxide as the three key ingredients for photosynthesis.
Question 5: Which part of the plant absorbs water and nutrients from the soil?
- Leaves
- Stem
- Roots (Correct answer)
- Flower
Correct answer: Roots
Roots anchor the plant and absorb water and nutrients from the surrounding soil.
Question 6: What is the role of the heart in the human body?
- To filter waste from the blood
- To pump blood throughout the body (Correct answer)
- To produce digestive juices
- To control breathing
Correct answer: To pump blood throughout the body
The heart is a muscle that pumps blood through the circulatory system to deliver oxygen to all body parts.
ITBS ITBS Science Concepts and Life Science 1
Which process do plants use to make their own food using sunlight?