Biology
Define the following terms :
- Autotrophs
- Photosynthesis
- Respiration
- Vascular system
- Stomata
Photosynthesis
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Answer
Autotrophs — Green plants can prepare their own food, hence they are called autotrophs.
Photosynthesis — Photosynthesis is the process by which green plants capture solar energy and use it to convert carbon dioxide and water into simple sugars.
Respiration — Respiration is the process in which glucose is broken down to release energy.
Vascular system — All plants have a transport system called vascular system made of xylem, which carries water and minerals from roots to leaves, and phloem, which transports glucose from leaves to other parts of the plant.
Stomata — Stomata are tiny openings found mainly on the lower surface of the leaves that allow gases to pass in and out.
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Fill in the blanks :
- Plants release …………… gas as a by product during photosynthesis.
- Plants use …………… gas in the process of respiration during day time.
- …………… gas turns lime water milky.
- …………… is used to decolourise the leaf.
- Iodine solution turns …………… into blue-black colour.
Name :
- Two main modes of nutrition in the organisms.
- Four essential requirements for the process of photosynthesis.
- Two categories of cells in the mesophyll of leaves.
- Two types of tissues of vascular system.
- Two types of respiration in the organisms.
Why do leaves generally look green?
What is the source of energy for photosynthesis?