set 1 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) Primary productivity is low
(b) Blooms are frequent in eutrophic lakes
(c) Plant nutrient flux is high
(d) Dominated by blue green algae
The correct answers to the above question in:
Answer: (c)
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Read more genetics evolution of life and ecological biodiversity Based General Science Questions and Answers
Question : 1
The book ‘Origin of Species’ is written by
a) Darwin
b) Watson
c) Aristotle
d) Lamarck
Answer »Answer: (a)
'Origin of Species' book was written by Charles Robert Darwin.
During his world journey (1831–1936) as a naturalist on the H.M.S. Beagle ship, he visited many parts of the world. On the basis of the observations of this journey, he wrote the book thereby describing his theory of natural selection.
Question : 2
Down’s syndrome is due to
a) chromosome number increase in 18th pair autosome
b) chromosome number decrease in 21st pair autosome
c) chromosome number increase in 21st pair autosome
d) chromosome number decrease in 18th pair autosome
Answer »Answer: (c)
Down syndrome is a case of Trisomy 21, a genetic disorder caused by the presence of all or part of a third copy of chromosome 21.
Question : 3
Which of the following is not a pteridophyte?
a) Polypodium
b) Ginkgo
c) Selaginella
d) Azolla
Answer »Answer: (b)
Ginkgo is a gymnosperm.
Question : 4
Match List-I with List-II :
| List-I | List-II |
| A. Discovery of transduction and conjugation | 1. Khurana |
| B. Establishing the sex-linked inheritance | 2. Kornberb |
| C. Isolation of DNA polymerase from E. coli | 3. Lederberg |
| D. Establishing the complete genetic code | 4. Morgan |
a) 4 3 1 2
b) 3 4 1 2
c) 4 3 2 1
d) 3 4 2 1
Answer »Answer: (c)
Question : 5
The book ‘Origin of Species’ was written by
a) Mendel
b) Darwin
c) Lamarck
d) de Vries
Answer »Answer: (b)
Question : 6
The accumulation of non-biodegradable substances in a food chain in increasing amount at each higher trophic level is known as:
a) Pollution
b) Accumulation
c) Eutrophication
d) Bio magnification
Answer »Answer: (d)
Non-biodegradable substances like pesticide residues cannot be digested or consumed by organisms, so, they are just passed on to organisms of the next trophic level along with food. These non-biodegradable residues keep on accumulating.
The higher the trophic level an organism occupies in the food chain higher will be the accumulation of non-biodegradable pesticide residues.
This phenomenon is called biomagnification. So, the correct answer is 'Biomagnification'
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