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Questions and Answers
What are the three main parts of a tree?
What are the three main parts of a tree?
- Crown, Trunk, and Roots (correct)
- Leaves, Stem, and Bark
- Branches, Flowers, and Seeds
- Roots, Stems, and Spores
Which of the following is NOT a layer of the trunk?
Which of the following is NOT a layer of the trunk?
- Cotyledon (correct)
- Xylem
- Phloem
- Bark
Which group of plants produces flowers?
Which group of plants produces flowers?
- Angiosperms (correct)
- Ferns
- Gymnosperms
- Mosses
What process do leaves use to make food?
What process do leaves use to make food?
Which of the following is a function of roots in plants?
Which of the following is a function of roots in plants?
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Study Notes
Structure of a Tree
- A tree consists of three main parts: the crown, trunk, and roots.
- The trunk has five layers:
- Bark: The protective outer layer.
- Cambium: A growth layer that produces new bark and xylem.
- Heartwood: The central core that provides support.
- Phloem: Transports nutrients from leaves to the rest of the tree.
- Xylem: Carries water and minerals from the roots to the leaves.
Plant Classification
- Plants are categorized into two main groups:
- Angiosperms: Flowering plants (e.g., daisies) that produce seeds enclosed in fruits.
- Gymnosperms: Non-flowering plants (e.g., pine trees) that have exposed seeds.
- Flowering plants can be further distinguished by examining seed types and leaf vein patterns.
- Non-flowering plants such as mosses and ferns reproduce via spores rather than seeds.
Importance of Plants
- Plants are essential for life on Earth, serving critical ecological functions.
- Each plant part has specific roles:
- Roots: Absorb water and essential nutrients from the soil.
- Leaves: Conduct photosynthesis to produce food and oxygen.
- Flowers/Fruits: Facilitate reproduction and seed dispersal.
- Humans rely on plants not only for food but also for oxygen production.
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