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MOST IMPORTANT general science mcq - 5 EXERCISES
The following question based on genetics, evolution of life & ecological biodiversity topic of general science mcq
(a) Bony fish – amphibians – reptiles – birds
(b) Birds – bony fish – amphibians – reptiles
(c) Amphibians – reptiles – bony fish – birds
(d) Reptiles – birds – bony fish – amphibians
e) Reptiles – birds – amphibians – bony fish
The correct answers to the above question in:
Answer: (a)
Mammals and birds both evolved from reptiles-like ancestors. All vertebrates before the evolution of birds and mammals were ectothermic.
Ectothermic means regulating the body temperature from the outside through behavioural changes like hiding under a rock in shade to keep cool on a hot, sunny day. Mammals and birds are endothermy mean they can regulate the body temperature from the inside through metabolic and other physical changes.
Hint: Charles Darwin concluded that existing living forms share similarities to varying degrees not only among themselves but also with life forms that existed millions of years ago. There has been a gradual evolution of life forms with variations in characteristics.
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Read more genetics evolution of life and ecological biodiversity Based General Science Questions and Answers
Question : 1
Group of organisms that closely resemble each other and freely interbreed in nature, constitute a
a) family
b) species
c) genus
d) taxon
Answer »Answer: (b)
Question : 2
Which one is linked to evolution?
a) Competition
b) Variation
c) Extinction
d) Reproduction
Answer »Answer: (b)
Organic evolution is the process of cumulative change of living populations and the descendant populations of organisms. According to Darwin, variations are differences among individuals.
Variations which help the individual to fit in its surroundings are passed on to the next generation while others disappear. Thus, variation plays an important role in evolution.
Question : 3
A dihybrid condition is
a) Tt rr
b) tt rr
c) tt Rr
d) Tt Rr
Answer »Answer: (d)
Dihybrid condition involves simultaneous inheritance of two pairs of mendelian factors or genes.
Question : 4
Match List-I with List-II :
| List-I (Indian wildlife species) | List-II (Scientific names) |
| A. Asiatic wild ass | 1. Boselaphus tragocamelus |
| B. Barasingha | 2. Rucervus duvauceli |
| C. Chinkara | 3. Equus hemionus |
| D. Nilgai | 4. Gazella bennettii |
a) A – 2; B – 3; C – 4; D – 1
b) A – 2; B – 3; C – 1; D – 4
c) A – 3; B – 2; C – 4; D – 1
d) A – 3; B – 2; C – 1; D – 4
Answer »Answer: (c)
Question : 5
Which of the following class of algae mostly found in salt water?
a) Chlorophyceae
b) Phaeophyceae
c) Rhodophyceae
d) Both (a) and (b)
Answer »Answer: (b)
Question : 6
Which one of the following represents a test cross ?
a) Ww × Ww
b) Ww × ww
c) Ww × WW
d) WW × WW
Answer »Answer: (b)
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