Oral Questions
1. What does 'photo' in photosynthesis mean?
2. What is the site of photosynthesis in green plants?
3. From where does carbon dioxide enter a leaf?
4. Name the nutrients other than glucose synthesised by plants.
5. How do plants meet their requirement of nitrogen to synthesise proteins?
Answers
Answer:
1 photosynthesis. Plants absorb sunlight and turn that energy into food; the process is known as photosynthesis. This is a compound word made up of photo (which means "light") and synthesis (which means "to put together"). ... A plant uses light to put together chemical compounds and turn them into carbohydrates: food.
2 The Cell. All green parts of a plant, including green stems and unripened fruit, have chloroplasts, but the leaves are the major sites of photosynthesis in most plants (FIGURE 10.2).. ... It is the light energy absorbed by chlorophyll that drives the synthesis of food molecules in the chloroplast.
3 All green parts of a plant, including green stems and unripened fruit, have chloroplasts, but the leaves are the major sites of photosynthesis in most plants (FIGURE 10.2). ... It is the light energy absorbed by chlorophyll that drives the synthesis of food ... Chloroplasts are found mainly in the cells of the meso- function phyll,
4 The carbohydrates are made of carbon, hydrogen and oxygen. These are used to synthesise other components of food. But proteins are nitrogenous substances which contain nitrogen.
5 Plants can get nitrogen to synthesise protein by- 1) They modify some parts of their body such as apex of leaf and change themselves to become insectivorous plants. 2) Leguminous plants like- pea plants,etc. have rhisobium bacteria in their root nodules which also provide them nitrogen.
Explanation:
Answer:
1. photosynthesis. Plants absorb sunlight and turn that energy into food; the process is known as photosynthesis. This is a compound word made up of photo (which means "light") and synthesis (which means "to put together"). ... A plant uses light to put together chemical compounds and turn them into carbohydrates: food.
2. The Cell. All green parts of a plant, including green stems and unripened fruit, have chloroplasts, but the leaves are the major sites of photosynthesis in most plants (FIGURE 10.2).. ... It is the light energy absorbed by chlorophyll that drives the synthesis of food molecules in the chloroplast.
3. On the surface of the leaves of the plants there are a large number of tiny pores known as stomata or stoma. For photosynthesis green plants take carbon dioxide from the air. The carbon dioxide enters the leaves of the plant through the stomata present on their surface.
4.Synthesis of plant food other than carbohydrates
The carbohydrates are made of carbon, hydrogen and oxygen. These are used to synthesise other components of food. But proteins are nitrogenous substances which contain nitrogen. From where do the plants obtain nitrogen.
5.Plants can get nitrogen to synthesise protein by- 1) They modify some parts of their body such as apex of leaf and change themselves to become insectivorous plants. 2) Leguminous plants like- pea plants,etc. have rhisobium bacteria in their root nodules which also provide them nitrogen
Explanation: