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Organisms And Populations

Question
CBSEENBI12001122
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Name the major abiotic factors and state their importance.

Solution
Environmental factors. These include :

1. Light. 2. Temperature. 3. Water. 4. Soil. 

1. Importance of light. It is important for photosynthesis, flowering in plants, plant growth, metabolism, and periodicity.

2. Effect of temperature. It is the most important factor affecting almost all activities of organisms. 

3. Effect of Water- Water is essential for life. It covers more than 70% of the earth’s surface and forms the most extensive habitat for the organisms. Types of plants and animals distributed in water bodies greatly depends upon the nature of water (fresh-water or sea water). Land plants derive water from the soil while the land animals derive water from pools, ponds, lakes, rivers, springs etc.

4.Effect of Soil - Soil provides the necessary nutrition and minerals for the growth of plants and also provides shelter to anumber of organisms. 

 

Some More Questions From Organisms and Populations Chapter

Population density is denoted by the symbol

The number of births during a given period in the
population that are added to the initial density is 

 :

The departure of a individual from a population is called :

In which interaction only one species is benefitted while the other species is neither harmed nor benefitted ?

Which of the following interaction both species suffer ?

In which of the following interaction both species are benefitted ?

Fill in the blanks with suitable words :

1. The optimal capacity of the organism to produce offspring is called........................

2. Rapid increase in human population is called........................

3. Mathematical expression of the growth of population is called........................

4. Yeast cells grown in a culture medium show........................growth curve.

5. Main cause of population explosion is........................

State true or false :

Coin one word for the following statements :

1.Organism that can tolerate only a narrow range of salinity.

2. Plants that can survive a wide range of temperature.

3. Interaction of two species in which one is benefited while other is neither benefited nor harmed.

4. Number of births during a given period in the population that are added to the initial density.

5. the process of maintaing a constant body temperature.

A few organisms can tolerate and thrive in a wide range of temperature, they are called........................

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