"Roots of Plants" PPT courseware

Description

Qingdao version of the first volume of science for the fourth grade, the roots of plants PPT courseware

Part One: Division of Roots

1. Divide according to the occurrence of roots

1. Tap root 2. Lateral root 3. Adventitious root

2. Divide according to root functions

1. Storage roots ⑴ fleshy roots ⑵ tuberous roots

2. Aerial roots ⑴ Climbing roots ⑵ Support roots ⑶ Respiratory roots

3. Parasitic roots

3. Divide according to the overall shape of the roots

1. Tap root system 2. Fibrous root system

Plant Roots PPT, Part 2: Root Structure

1. Root cap: a cap-like structure composed of thin-walled cells. Located at the top of the root apex and surrounding the meristematic zone of the root apex.

2. Meristematic zone: The meristematic zone is located on the inside of the root cap, with a total length of 1-2 mm. It is the main place where new cells divide and produce, and is also called the growth point.

3. Elongation zone: The elongation zone is located in the later part of the meristematic zone. The cell division activity in this zone becomes weaker and weaker and gradually stops, while the cell volume continues to expand and elongate along the longitudinal axis of the root.

Plant Roots PPT, Part 3: The Function of Roots

Plant roots anchor the plant.

Plant roots mainly rely on root hairs to extend into the soil to absorb water. While the roots absorb water, they also absorb nutrients dissolved in the water.

Roots are reservoirs of nutrients.

Keywords: Free download of Qingdao version of fourth grade science PPT courseware, Volume 1, Roots of Plants PPT download, .PPT format;

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"Plant Roots and Material Absorption" PPT courseware Part 1: Discussion 1. What are the fundamental reasons for the continuous growth and elongation of roots? The division of cells in the root apical meristematic zone and the differentiation and elongation of cells in the elongation zone. 2. In agricultural production, transplanting crop seedlings...

"Plant Roots and Material Absorption" PPT:

"Plant Roots and Material Absorption" PPT Part One Content: Root System Introduction (1) Root System of Plants: All the roots of a plant together are called root systems. A root system with clearly developed main roots and lateral roots is called a tap root system. There are no obvious main and lateral roots...

"Roots of Plants" PPT download:

Qingdao Edition Fourth Grade Science Volume 1, Plant Roots PPT Download Part One: Observing the Characteristics of Roots 1. Observing the Characteristics of Roots What are the common characteristics of the above roots? Roots have root tips and root hairs, all grow downward, all grow underground, and have main roots, lateral roots, branches...

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Update Time: 2024-10-03

This template belongs to science courseware Qingdao Edition Fourth Grade Science Volume 1 industry PPT template

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