set 2 MCQ Questions & Answers Detailed Explanation
MOST IMPORTANT general science mcq - 5 EXERCISES
The following question based on genetics, evolution of life & ecological biodiversity topic of general science mcq
(a) Hydration
(b) Crystallization
(c) Exfoliation
(d) Carbonation
The correct answers to the above question in:
Answer: (b)
Crystallization processes of weathering belong to both mechanical and chemical weathering. Mechanical or physical weathering involves the breakdown of rocks and soils through direct contact with atmospheric conditions, such as heat, water, ice and pressure.
Chemical weathering - the process by which the internal structure of a mineral is altered by the addition or removal of elements.
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Read more genetics evolution of life and ecological biodiversity Based General Science Questions and Answers
Question : 1
Flow of energy in an ecosystem is always
a) Multi directional
b) Unidirectional
c) Bidirectional
d) No specific direction
Answer »Answer: (b)
Energy flow in an ecosystem is always unidirectional in nature because most of the energy is released at the trophic level in the form of heat and performing metabolic activities.
Hence 10% is transferred from one trophic level to another. This makes a unidirectional flow of energy.
Question : 2
The term ‘Survival of Fittest’ was used by
a) Jean Baptiste
b) Charles Darwin
c) Herbert Spencer
d) Hugo de Vries
Answer »Answer: (c)
Herbert Spencer
He is a sociologist, who coined the phrase “survival of fittest” to explain the tendency of human society to change by itself as the strongest and fittest survive while the weak abolish themselves.
Question : 3
An alga very rich in protein is
a) Oscillatoria
b) Spirogyra
c) Ulothrix
d) Chlorella
Answer »Answer: (d)
Chlorella can be grown to provide human food rich in proteins, lipids, carbohydrates, vitamins and minerals.
Question : 4
During the post-fertilisation period the ovules develop into __________ and the ovary matures into a _________.
a) A – flower; B – seed
b) A – seeds; B – fruit
c) A – fruit; B – seeds
d) A – seeds; B – flower
Answer »Answer: (b)
Question : 5
Darwin’s theory of natural selection is based on
a) Survival of the fittest
b) Over production
c) Struggle for existence and variation
d) All of the above
Answer »Answer: (d)
Question : 6
The primitive atmosphere of earth contained water vapours, hydrogen, ammonia and
a) O2
b) N2
c) CO2
d) CH4
Answer »Answer: (d)
The primitive atmosphere of the earth contained : H2 O, H2 , NH3 & CH4 . The ratio was (2 : 2 : 1) of : NH3 , CH4 and hydrogen.
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