Revision Questions
Ch-1
Nutrition in plants
Biology
Class 7
I am giving Revision Questions for your easyness. If you have any dout in this question please tell me.
1. What are nutrition? [ 2 mark]
2. What are mode of nutrition.[2marks]
3. What is the difference between heterotrophs and autotrophs [3marks]
4. What is Photosynthesis. Which are the raw materials carried by Photosynthesis. Label the equation [5mark]
5. Why sunlight is called the ultimate source of energy.[3mark]
6. What is cell ?[2marks]
7. What is transipation ? [3marks]
8. What are saprotrophs ? [3marks]
9. What is symbiotic mode of nutrition. Give example also.[3marks]
10. What is lichens? What do they provides [3marks]
Il. What is inseltivorous? Give examples.[3marks]
12. What is parasitic mode of nutrition? [3marks]
13. What is Rhizobium. What it provides. What is its importance.
14. Draw and label the structure of a open and closed stomata.
If you want answer please tell me I will help you thanku
Answers
Answer:
1.Nutrition is the science that interprets the nutrients and other substances in food in relation to maintenance, growth, reproduction, health and disease of an organism. It includes ingestion, absorption, assimilation, biosynthesis, catabolism and excretion.
2.Four Main Heterotrophic Nutrition Types
This consists of 5 stages, ingestion, digestion, absorption, assimilation and defecation. Organisms feed on dead organic remains of other organisms. Organisms obtain food from other living organisms (the host), with the host receiving no benefit from the parasite.
3.Autotrophs are known as producers. Examples include plants, algae, and some types of bacteria. Heterotrophs are known as consumers.
4.
the process by which green plants and some other organisms use sunlight to synthesize nutrients from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a by-product. Equation:Aerobic respiration= glucose+oxygen-->carbon dioxide and water; photosynthesis=carbon dioxide + water--> glucose (carbohydrate) + oxygen.
5.he Sun is the Ultimate Source of Energy. Every morning the sun rises, bringing light and heat to the earth, and every evening it sets. ... Plants convert light energy from the sun into chemical energy (food) by the process of photosynthesis. Animals eat plants and use that same chemical energy for all their activities.
6.Cell is the structural and unit of life.It is the smallest unit of life
Answer:
Nutrition is the science that interprets the nutrients and other substances in food in relation to maintenance, growth, reproduction, health and disease of an organism. It includes ingestion, absorption, assimilation, biosynthesis, catabolism and excretion.