Question

Give reason for the following:

(1) Green leaves are thin and broad.
(ii) Photosynthesis is considered as a process
supporting all life on earth.
[ICSE 2011]
(iii) All the food chains begin with green plants.
[ICSE 2018]
(iv) Animals owe their existence to chlorophyll.
[ICSE 2008]
(V) Sleeping under a tree at night is not advisable.
[ICSE 2010]
(Vi) All life on Earth is supported by Photosynthesis.
[ICSE 2019]


Please please answer them....
If u don't know the answer then don't give any irrevelent answer please...
It's a humble request....
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Answer 1

Answer:

1. Due to their broad surface areas, green leaves can absorb more sunlight at a given time, and due to the thinness of the leaves, the light energy can easily penetrate the leaf surface and be trapped by the chloroplasts. This makes photosynthesis efficient. Therefore, green leaves are thin and broad.
2. This process produces food and releases oxygen, both of which are necessary to maintain life on earth.
3. A food chain always starts with a producer. This is an organism that makes its own food. Most food chains start with a green plant, because plants can make their food by photosynthesis. A living thing that eats other plants and animals is called a consumer.
4. Plants produce their own food by using light and chlorophyll. The herbivores directly eat plants. The carnivorous animals feed on the herbivores. Thus, all types of animals, including man, depend on plants directly or indirectly for food. Therefore, animals owe their existence to chlorophyll.
5. That is, the plants leave carbon dioxide at night. On the basis of this it is that in the night if you sleep under the tree, you will not get oxygen, which can cause breathing problem, suffocation etc. Therefore, sleeping under a tree at night is not advisable
6. Photosynthesis is important to living organisms because it is the number one source of oxygen in the atmosphere. Without photosynthesis, the carbon cycle could not occur, oxygen-requiring life would not survive and plants would die.

Answer 2

Answer:

1.Green leaves are thin and broad because due to thinness of leaves enhances the rapid transport of materials and if the surface area of leaves is large or broad so it can absorb maximum sunlight for photosynthesis.

2 photosynthesis is the process that produces food and releases oxygen, both of which are necessary to maintain life on earth.

3 Green plants are the only autotrophs which prepares their own food. All other living beings depends upon green plants for their food so all the food chain begins with green plant

4.Plants produce their own food by using light and chlorophyll. The herbivores directly eat plants. ... Thus, all types of animals, including man, depend on plants directly or indirectly for food. Therefore, animals owe their existence to chlorophyll

5 At night, photosynthesis does not takes place and so plants do not absorb carbon dioxide and release oxygen. Only respiration occurs in plants and during respiration they release carbon dioxide. This makes the air under the tree stale. Hence it is not advisable to sleep under the tree.

6. Our food chain starts with producer if that green parents as they are the only organism which can prepare their own food by photosynthesis process. All other living organisms depends upon then directly or indirectly for food. Photosynthesis is thus the process by which oxygen is released to our atmosphere which is a life supporting gas. So we can say that directly or indirectly all life on the earth is supported by photosynthesis.

Explanation:

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