Symmetry (Biology MCQs for NEET)
1.) Which is the appropriate definition of ‘Symmetry’?
a) The arrangement of cells of body from tissue end
b) The arrangement of parts of body from a central axis
c) The arrangement of gonads of body from end of anus
d) The arrangement of nerves of body from brain
2.) When one plane divides animal body into two mirror images then it is known as:
a) Bilateral symmetry
b) Asymmetry
c) Radial symmetry
d) Bilateral symmetry
3.) Which structure protects the body of invertebrates?
a) Shells
b) Skin
c) Fins
d) Denticles
4.) Which of the following pair is wrong?
a) Organisms which have definite right and left halves → Bilateral symmetry
b) Organisms which have radiate body parts from centre → Radial symmetry
c) Organisms which has definite shape → Asymmetry
d) All of them
5.) Identify the type of body symmetry:
If we cut this animal from the centre, then all the parts of its body will be symmetrical.
a) Asymmetrical
b) Bilaterally symmetrical
c) Radially symmetrical
d) None of above
6.) The protozoan group of animal which have sphere shape shows:
a) Bilateral symmetry
b) Radial symmetry
c) Asymmetry
d) Spherical symmetry
7.) Animals which are asymmetrical do not show ……………………………………………………………………………………….
a) Definite symmetry
b) Indefinite symmetry
c) Definite asymmetry
d) Indefinite asymmetry
8.) Which of the following animal represent Biradial symmetry?
a) Dogs
b) Crocodile
c) Comb Jellies
d) Humans
9.) Animals like cats, butterfly and humans show:
a) Asymmetry
b) Radial symmetry
c) Bilateral asymmetry
d) Bilateral symmetry
10.) Along with how many planes the body of bilateral symmetrical animal is divided?
a) One
b) Two
c) Three
d) Four
Answers:
1.)
Solution:b) The arrangement of parts of body from a central axis
Symmetry is defined as the arrangement of parts of body from a central axis. Body can show asymmetry, bilateral symmetry and radial symmetry.
2.)
Solution:a) Bilateral symmetry
Animals which have definite right and left halves are bilaterally symmetrical. When one plane divides animal body into two mirror images then it is known as Bilateral symmetry.
3.)
Solution:a) Shells
Invertebrates don’t have backbone for the support. They have shells and exoskeleton for the protection.
4.)
Solution:c) Organisms which has definite shape → Asymmetry
This is the wrong pair because asymmetrical organisms do not have definite shape.
5.)
Solution:c) Radially symmetrical
From the centre of the body, radially equilibrium organisms are symmetrical. If we cut that animal from centre, then it will give all equal half.
6.)
Solution:d) Spherical symmetry
Both protozoan groups of Radiolaria and Heliozoia show spherical symmetry because their body is sphere shaped.
7.)
Solution:a) Definite symmetry
Organisms which do not have particular symmetry. Also, animals which do not show definite symmetry are asymmetrical.
8.)
Solution:c) Comb Jellies
In only two plans, when an animal is divided into equal parts then it is Biradial symmetry. Hence, comb jelly shows biradial symmetry.
9.)
Solution:d) Bilateral symmetry
Cats, butterfly and humans show definite right and left halves. All of these animals are bilaterally symmetrical.
10.)
Solution:a) One
Along with single plane, the body of bilateral symmetrical animal is divided into equal halves. Animals that show this type of equilibrium are very complex.
For more update follow net explanations page