Prentice Hall Biology (California)
Prentice Hall Biology (California)
1st Edition
Kenneth R. Miller, Levine
ISBN: 9780132013529
Textbook solutions

All Solutions

Section 23.2: Roots

Exercise 1
Step 1
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**Roots** are the part of the vascular plant that is found normally underground. They are modified to give anchorage for the plant and to absorb water, nutrients, and minerals in the environment which will be used by the plant to grow tall
Step 2
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**Taproot** is the primary root that grows long and vertically and forms the secondary root– This root is usually found in dicot plants.

**Fibrous root** is the root that can be found in monocot plants. This root branches into different similar-sized roots up until there is no single root that grows larger that the others

Exercise 2
Result
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The root contains dermal tissues that act as an external layer, vascular tissues located at the center of the root, and ground tissues that are located between the dermal and vascular tissues.
Exercise 3
Step 1
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**Roots** are the part of the vascular plant that is found normally underground. Roots can be fibrous, creeping, tuberous, etc.
Step 2
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The two main functions of roots are:

1. It anchors the plant by growing different root branches down into the soil horizontally and vertically.
2. It absorbs water and nutrients from the soil using different mechanisms

Exercise 4
Solution 1
Solution 2
Step 1
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Osmosis is used in the absorption of water when the cells in the root accumulate ions from the soil, creating a higher concentration of water outside the root than inside, causing water to diffuse into the root.
Step 1
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Osmosis is when there is a high concentration of mineral ions in the plant cells root that attracts and pulls water and nutrients from outside the root into the root through a semi-permeable membrane
Result
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see explanation for solution
Exercise 5
Result
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Roots are mainly responsible for the uptake of nutrients and water in plants. They serve as the main gateway of the plant’s vascular system. The cells in the root hairs and root epidermis, which are parts of a root subsystem, absorb the dissolved substances from the ground. Without the root system in a plant, the absorption and transport of nutrients would not take place.
Exercise 6
Result
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Due to the molecular forces acting between the water and the plant’s transport tissues, the water molecules and nutrients flow in an upward manner. This role of the epidermis is extremely important because the pressure coming from the roots allows the molecules to go up instead of accumulating inside the root system. If this happens, the roots will begin to expand as they fill up with water and nutrients, and such molecules are not transported to the other parts of the plants.
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