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) brown algae
(b) red algae
(c) green algae
(d) blue-green algae
The correct answers to the above question in:
Answer: (b)
The Agar is obtained from several members of red algae such as Gracilaria, Gelidium, Chondrus etc. Agar gels are extensively used for growing microorganisms.
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Question : 1
Homologous organs are
a) gills of fish and lungs of rabbit
b) pectoral fins of fish and fore limbs of horse
c) wings of insects and bat
d) wings of grosshopper and crow
Answer »Answer: (b)
Organs that are similar in fundamental structure but different in functions are “homologous organs”, Richard Owen, introduced the term homologous. Pectoral fins of fish and fore limbs of horse similar in structure but different in functions are homologous organs. Rest of the organs compared in the question are analogous organs.
Question : 2
Gene for colour blindness is located on
a) X-chromosome
b) 13th chromosome
c) Y-chromosome
d) 21st chromosome
Answer »Answer: (a)
The gene which is responsible for colour blindness is carried on the X chromosome and this is the reason why many more men are affected than women. The blindness is manifested in terms of inability to distinguish between red and green colour.
Question : 3
Match List-I with List-II :
List-I (Name of the Scientist) | List-II (Contributions) |
A. Charles Darwin | I. Mutation theory |
B. Lamarck | II. Germplasm theory |
C. Hugo de Vries | III. Philosophie Zoologique |
D. Ernst Haeckel | IV. The Origin of species |
E. August Weismann | V. Biogenetic law |
VI. Essay on population |
a) A – IV; B – VI; C – V; D – III; E – I
b) A – IV; B – III; C – I; D – V; E – II
c) A – IV; B – III; C – V; D – I; E – VI
d) A – II; B – III; C – I; D – V; E – II
Answer »Answer: (b)
Question : 4
In the context of ecology and environment, what does the Red Data Book pertain to?
a) A description of the consequences of nuclear holocaust
b) Details of harmful levels of various pollutants
c) A complete list of all endangered plants and animals
d) A description of the sociological and psychological consequence of genetically modified plants and animals
Answer »Answer: (b)
Question : 5
Leaves of dicotyledonous plants possess ________ venation, while ____________ venation is the characteristic of most monocotyledons.
a) reticulate and perpendicular respectively
b) reticulate and parallel respectively
c) parallel and reticulate respectively
d) obliquely and parallel respectively.
Answer »Answer: (b)
Question : 6
The last chain of food are
a) Parasites
b) Producers
c) Decomposers
d) None of the above
Answer »Answer: (c)
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