Major Abiotic Factors

Q.

Plants follow different pathways in response to the environment or phases of life to form different kinds of structures. This ability is called:

1. Elasticity

2. Flexibility

3. Maturity

4. Plasticity

Q.

Soil formation is done by both abiotic and biotic factors. List the names of these factors by classifying them as abiotic and biotic?

Q.

How does the atmosphere act as a protective blanket?

Q. What will happen to a well growing herbaceous plant in the forest, if it is transplanted outside the forest in a park?

1. It will grow normally
2. It will grow well because it is planted in the same locality
3. It may not survive because of change in its micro climate
4. It grows very well because the plant gets more sunlight

Q. Read the following statements (i - iv) and select ‌the‌ ‌incorrect‌ ‌statements‌ ‌related to the abiotic factor water.

(i)‌ For organisms living in water bodies, chemical composition and pH plays an important role.
(ii)‌ ‌Organisms that can tolerate only a narrow range of salinity are called stenosaline.
(iii)‌ The salinity is < 5 ppt for inland waters and > 100 in hypersaline lagoons.
(iv)‌ ‌Organisms living in oceans, lakes and rivers do not face any water related problems. ‌

1. (i), ‌ ‌(ii)‌ ‌and‌ ‌(iii)‌ ‌
2. (ii), ‌ ‌(iii)‌ ‌and‌ ‌(iv)‌ ‌
3. (ii)‌ ‌and‌ ‌(iv)‌ ‌
4. (i), ‌ ‌(iii)‌ ‌and‌ ‌(iv)‌ ‌

Q. ___ factors are the physico-chemical components that characterise the habitat of an organism.

Q. Which of the following is NOT an abiotic factor?

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

Q. A student while working on a project regarding animals present in the polar regions found that almost all the animals are large. He rarely found animals that were small in size.

Smaller animals are rarely found in polar regions because

1. they rapidly lose a large amount of heat due to their large surface area compared to volume
2. they rapidly lose a large amount of heat due to their small surface area compared to volume
3. they slowly gain a large amount of heat due to their large volume compared to surface area
4. they slowly lose a large amount of heat due to their large surface area compared to volume

Q.

List various abiotic environmental factors.

Q.

The ______ is ultimate source of light on earth.

Q.

Sun is the ultimate source of energy for all living forms on earth.

1. True
2. False

Q.

Weather, climate, atmosphere and soil form the _____ component of ecosystem.

Q. A soil sample is found to have 25% of its volume occupied by soil water. Of this, 10 % is hygroscopic water and remaining is capillary water. What is the field capacity of this soil?

1. 10%
2. 15%
3. 25%
4. 35%

Q. Describe the components of an ecosystem.

Q.

The ultimate source of energy on earth for all living organisms is ______ .

Q. Explain nitrogen cycle in nature and define all the terms involved in it.

Q. The subtropical climatic zone lies between

1. $0-{22}^o$ latitude
2. ${20}^o-{40}^o$ latitude
3. ${40}^o-{60}^o$ latitude
4. ${60}^o-{80}^o$ latitude

Q.

Column I	Column II
(A) Eastern Ghats	(p) Western and Eastern Himalayas
(B) Estuarine ecosystem	(q) Rajasthan, Punjab and part of Gujarat
(C) Indus plains	(r) West Bengal and Andaman Nicobar
(D) Arctic zone	(s) Cape Comarine to Gujarat

Q. Identify the correct match.

1. Aestivation - Bears
2. Hibernation - Snails
3. Both (b) and (c)
4. Diapause - Zooplankton

Q. Which of the abiotic factor(s) in water affect(s) the kind of species that thrive in the aquatic environment?

1. pH
2. Chemical composition
3. Salinity
4. Precipitation

Q. If there were no atmosphere around the earth, the temperature of the earth will

1. Increase
2. Go on decreasing
3. Increase during day and decrease during night
4. Be uneffected.

Q. Pedology is the science of

1. Rocks
2. Diseases
3. Soil
4. Pollution

Q. Select the abiotic factors of an ecosystem.

1. Sunlight, temperature, precipitation, water or humidity, soil chemistry and food
2. Bacteria, fungi, detritus and other microorganisms
3. Sunlight, temperature, precipitation, water or humidity and soil chemistry
4. Air, water and food

Q. Edaphic factors are related to

1. Humidity
2. Soil texture
3. Rainfall
4. Wind velocity

Q. The terrestrial and aquatic ecosystems can be differentiated on the basis of the fact that

1. Organisms in terrestrial ecosystems are dependent on oxygen, while those in aquatic ecosystems are not.
2. Nutrients are a limiting factor for populations in aquatic ecosystems but not for terrestrial populations.
3. Producers make up the greatest amount of biomass in terrestrial ecosystems, while in aquatic ecosystems they do not.
4. Sunlight is a limiting factor for populations in terrestrial ecosystems but not for populations in aquatic ecosystems.
5. Energy in aquatic ecosystem is transferred from lower to higher trophic levels, but it moves in the opposite direction in aquatic ecosystems.

Q. In a hardening process:-

1. Plantlet is placed in reduced light and high humidity for short time.
2. Plantlet is placed in favourable conditions for long time.
3. Plantlet is transfer in a new fresh medium.
4. Plantlet is placed in a high light intensity.

Q. Match the following type of transplantations to their correct description

Q. Organism are influenced by biotic and abiotic factors. Write an account of any three abiotic environmental factors.

Q. State whether the following statement is true or false.
The climatic regions of the Earth are polar region and desert region.

1. True
2. False

Q. Which of the following are major biome determining factor:

1. Annual variation insnowfall
2. All of the above
3. Annual variation in temperature
4. Annual variation in rainfall