12 Questions
What is the main function of chlorophyll in plants?
To capture sunlight for photosynthesis
What is the primary purpose of stomata in plants?
To facilitate gas exchange between the plant and the environment
What happens to the excess sugar produced by plants during photosynthesis?
It is stored as starch in the plant's cells
Why do we see bubbles coming out from the underside of a leaf when it is submerged in warm water?
Because the leaf is releasing oxygen produced during photosynthesis
What is the term for the process by which plants make their own food using sunlight?
Photosynthesis
What is the purpose of spines on a cactus?
To protect the plant from predators
What is the name of the process by which plants make food using light energy?
Photosynthesis
What is the green pigment found in leaves and some parts of a plant that captures sunlight?
Chlorophyll
What is the reason for the gain in mass as plants grow?
The food that the plants make
What is the substance produced during photosynthesis that is stored in different parts of a plant?
Starch
What is the purpose of stomata in plants?
To allow carbon dioxide to enter and oxygen to leave
What is the test used to determine if a leaf has made food?
Iodine solution
Study Notes
Photosynthesis and Plant Structure
- Chlorophyll, a green pigment, is present in leaves and helps capture sunlight for photosynthesis.
- Leaves have tiny openings called stomata, usually found on the underside, which allow for gas exchange (carbon dioxide in, oxygen out).
Stomata and Gas Exchange
- Stomata are responsible for the entry and exit of gases, including carbon dioxide and oxygen.
- Carbon dioxide enters the plant through stomata for photosynthesis.
- Oxygen produced during photosynthesis is used by the plant for respiration and excess oxygen leaves through stomata.
Plant Storage
- Plants store excess sugar produced during photosynthesis as starch in different parts, such as roots, stems, fruits, and seeds.
- Examples of starch-storing plant parts include carrots, potatoes, unripe bananas, and rice.
Detecting Starch in Leaves
- Iodine solution can be used to test for the presence of starch in leaves.
- Iodine solution changes from brown to blue-black in the presence of starch.
Importance of Photosynthesis
- Photosynthesis is essential for plants to produce food and energy.
- The energy stored in plants and animals is derived from the Sun.
- Plants provide food and energy for animals, which feed on them directly or indirectly.
Key Points
- Photosynthesis is the process by which plants use carbon dioxide, water, and light to make food.
- Plants make food in the form of sugar during photosynthesis.
- Oxygen is also produced during photosynthesis.
- Biomass is matter made up of cells and tissues.
This quiz covers the process of photosynthesis, how plants capture sunlight and make food, and the role of stomata in carbon dioxide uptake.
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