Complete the following paragraphs explaining why leaves change color in the fall

Question

Complete the following paragraphs explaining why leaves change color in the fall and how leaves are seasonally shed The most abundant pigment in chloroplasts is giving leaves their typical green color. However, in the fall these green pigments tend to break down due to reduced daylight hours; their elimination allows other pigments present in chloroplasts to show. Some of these include which is yellow, and which is a pale yellow. A leaf's fall color can also be influenced by two pigments that can accumulate in leaf cell vacuoles. The most common is a red or blue pigment depending on if the cell sap is respectively. The other pigment type, appears in only a select group of plant families and is always red. Most plants will vary considerably in the fall color they exhibit depending on the relative amounts of pigments they have as well as their geographic location. In addition to changing color, trees also lose their leaves through a process called during autumn in temperate regions and during the dry season in the tropics. As a leaf matures, two layers of cells will develop within the abscission (part of the stem and composed of cells coated and impregnated with suberin) and the (part of the leaf and made up of swollen, gelatinous cels). Changing environmental conditions during the leaf shedding-season such as decreased temperatures or lack of water wil then cause the n the middle lamella to break down in the separation layer. With only xylem strands holding the leaf onto the stem, wind and rain will inevitably cause the leaf to fall betacyanin protective layer pectins chlorophyll anthocyanin separation layer

Explanation / Answer

1. chlorophyll.

2. carotene

3. xanthophyll

4. anthocyanin

5. acidic

6. basic

7. betacyanin

8. decidious

9. abscission

10. protected zone layer

11. seperation layer

12.pectins

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