.
4. Answer in brief.
HOTS
Ree
a) Why are plants called producers?
b) Why are leaves of a plant usually green in colour?
c) What is the main function of a leaf?
d) Name the part of a leaf through which a plant breathes.
e) What are the things essential for plants to make food?
pre
ch
AT A GL
5. Answer in detail.
a) Describe the process by which plants make their food.
b) How do plants use the food they prepare?
c) Can green plants make their food at night? Give reason for your answer.
d) Why does a cut potato turn blue-black when a few drops of iodine are put on it?
e) How do plants and animals maintain the balance of oxygen and carbon dioxide
in nature?
Answers
Answer: Hi friend, here is your answer
HOTS
a)Plants are called producers. This is because they produce their own food! They do this by using light energy from the Sun, carbon dioxide from the air and water from the soil to produce food - in the form of glucose/sugar.
b)The leaves of most plants are green, because the leaves are full of chemicals that are green. The most important of these chemicals is called “chlorophyll” and it allows plants to make food so they can grow using water, air and light from the sun.
c)The main function of a leaf is to carry out photosynthesis, which provides the plant with the food it needs to survive.
d)The leaves of plants have tiny pores on their surface which are called stomata. The exchange of gases in the leaves during respiration takes place through stomata. This happens as follows: Oxygen from the air enters into a leaf through stomata and reaches all the cells by the process of diffusion. So the name of the part through which plants breathes is called stomata.
e)To perform photosynthesis, plants need three things: carbon dioxide, water, and sunlight. for photosynthesis. Carbon dioxide enters through tiny holes in a plant's leaves, flowers, branches, stems, and roots. Plants also require water to make their food.
5. Answer in detail.
a)Their roots take up water and minerals from the ground and their leaves absorb a gas called carbon dioxide (CO2) from the air. They convert these ingredients into food by using energy from sunlight. This process is called photosynthesis, which means 'making out of light'.
b)Plants make food in their leaves . ... Chlorophyll can make food the plants can use from carbon dioxide water nutrients and energy from sunlight . During the process of photosynthesis , plants release oxygen to the air .
c) Plants make their food through photosynthesis which require sun light water and chlorophyll. Sun light is available at day time not at night. So plant do not make food at night. ... Chlorophyll can make food the plant can use from carbon dioxide water nutrients and energy from sunlight.
d)When will drop iodine solution on potato the area which comes under contact of iodine solution will turn blue-black due to presence of starch. ... If starch amylose is not present, then the color will stay orange or yellow.
e)The balance of oxygen and carbondioxide is maintained in the atmosphere by the oxygen released by plants during photosynthesis and carbondioxide released by human,animals etc. in the atmosphere. The balance of oxygen and carbondioxide is made due to respreration and photosinthesis.
I am sorry if I gave the answer late.
I did not write down the question I just wrote the answer down for each of the following questions.
I hope this will help u
Answer:
what is the main function of a leaf