LIFE PROCESSES
1] What are different types of life processes?
ANSWER
- Movement
- Respiration
- Sensitivity
- Growth
- Excretion
- Reproduction
- Nutrition
2] Define autotrophic nutrition?
ANSWER:
In this mode of nutrition, the organisms prepare their own food from simple raw materials like water, carbon dioxide and mineral salts in the presence of sunlight. Chlorophylls present in the chloroplast or green plants are the site of food production. Accordingly all green plants are the examples of this category. The process by which they synthesize food is known as photosynthesis.
3] Define heterotrophic nutrition?
ANSWER:
The organisms which derive their food from others are known as heterotrophic organisms. They depend for their food on other organisms, hence they are called consumers. All animals, human beings and non-green plans like fungi come under this category. They consume complex organic food prepared by autotrophs or producers and break it into simple from to derive nourishment. Thus the difference between heterotrophy and autotrophs is basically in the mode of production of food. Due to lack of chlorophyll, heterotrophs cannot synthesize their food while autotrophs can perform photosynthesis.
4] What are the functions of stomata?
ANSWER:
- It helps in respiration in plants. during the day it opens and it takes carbon dioxide from the environment and gives out oxygen,
- It also helps in the process of transpiration. it opens and through it the excessive water gets out in the environment.
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