set 4 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) Reptilia and Mammalia
(b) Amphibia and Aves
(c) Reptilia and Aves
(d) Aves and Mammalia
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
In which one of the following sets of animals do all the four give birth to young ones?
a) Kangaroo, Hedgehog, Dolphin, , Loris
b) Platypus, Penguin, Bat, Hippopotamus
c) Shrew, Bat, Cat, Kiwi
d) Lion, Bat, Whale, Ostrich
Answer »Answer: (a)
Penguin, kiwi & ostrich all belong to class Aves of chordata (i.e. birds) and they do not give birth to their young ones, they are oviparous while kangaroo, hedgehog, dolphin, loris all belong to class mammalia and are viviparous.
Question : 2
In class of Amphibia, respiration occurs through
a) skin
b) gills
c) lungs
d) All of these
Answer »Answer: (d)
Question : 3
Consider the following statements :
- Human beings have 23 pairs of chromosomes.
- Sex chromosome in human male are named XY.
- Chromosomes are best seen in metaphase.
a) 1, 2 and 3
b) 2 and 3
c) 1 and 2
d) None
Answer »Answer: (d)
Humans have 46 chromosomes i.e., 23 pairs of chromosomes, of which 21 pairs are autosomes and 2 pairs are allosomes or sex chromosomes.
Human male sex chromosomes are named XY. During cell division, the chromosomes of every cell are most condensed are arrange themselves on the equatorial plane which makes them best visible.
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