Science Chapter 1- Lesson 3 -...
Transcript of Science Chapter 1- Lesson 3 -...
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Science Chapter 1- Lesson 3
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Plants obtain air and sunlight directly from their environments. Transporting water and nutrients can be very difficult.
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Nonvascular plants are small and survive without a transport system.
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Vascular plants can transport water and nutrients to the top of the tallest trees.
Vascular plants are divided into seed plants and seedless plants. A seed contains an undeveloped plant, stored food, and a protective covering.
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Seedless Plants
They produce spores. A spore is a single cell that can develop into a new plant exactly like the plant that produced it.
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Two Types of Seed Plants
1.Gymnosperm 2.Angiosperm
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Gymnosperm-a seed plant that does not produce flowers Angiosperm-a seed plant that produces flowers (ex. rose bushes)
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Please answer the following questions in your notebook:
1. A plant is 65 feet tall and does not produce flowers. What conclusions can you draw about this plant?
2. How is height an advantage to some vascular plants?
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What are roots? A root is the part of the plant that absorbs water and minerals, stores food, and anchors the plant. Roots absorb water using fuzzy root hairs.
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Vascular Plant Roots Vascular Plant Roots are made of 3 parts: 1. Root Cap: covers the tip of the root 2. Epidermis: outer layer of a root 3. Cortex: located under the epidermis and stores food and nutrients
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Four Types of Roots:
1.Aerial Roots 2.Fibrous Roots 3.Taproots 4.Prop Roots
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Please answer the following questions in your notebook:
An area has many plants with taproots. Where would you expect to find underground water in this area?
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Stems have 2 functions: 1. it is a support structure 2. serves as a transport system for the plant Two types of cells make this transport System: *Xylem- moves water and minerals up the plant *Phloem- moves sugars that are made by the plant to other parts of the plant
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The xylem and phloem are separated by a layer called the cambium.
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Please answer the following questions in your notebook:
Why do most trees have woody stems?
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What are leaves?
The leaves of a plant carry out photosynthesis, or the food making process.
Plants need 3 materials to carry out Photosynthesis: 1. sunlight 2. water 3. carbon dioxide
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Transpiration
Transpiration is the loss of water through a plant’s leaves.
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Cellular Respiration
Cellular respiration is the process in which “energy” is released from food (sugar) inside a cell. Cellular respiration occurs in the mitochondria of cells.