Reproduction in Animals Class 8 Quiz Question with Answer
Reproduction in Animals Class 8 Quiz Question with Answer. CBSE Class 8 Science Lesson 9 Mock Test.
1.) The mode of reproduction is in the cow is?
A) Asexual
B) Sexual
C) Both (A) and (B)
D) None of these
Solution: [B] Sexual
Explanation: Cow is reproduce by sexual reproduction in which sperm of male and egg of female are fused to form a zygote.
2) The fertilization take place inside the body is called
A) External fertilization
B) Internal fertilization
C) Both (A) and (B)
D) None of the above.
Solution: [B] Internal fertilization
Explanation: internal fertilization take place inside the female body is called as internal fertilization while that fertilization take outside the female is called external fertilization; hence option [B] is correct.
3) Which of them is a male gamete?
A) Sperm
B) Zygote
C) Ova
D) All of these
Solution: (A) Sperm
Explanation: the male parent produce male gamete is called sperm while ova is a female gamete, hence solution is option A)
4) Which of the following is a female gamete?
A) Sperm
B) Zygote
C) Ova
D) Uterus
Solution: [C] Ova
Explanation: the female parent produces female gametes called egg or ova. While, the sperm is male gamete.
5) Fusion of male and female gametes is called as?
A) Oviparous
B) External fertilization
C) Fertilization
D) None of these
Solution: [C] Fertilization
Explanation: fusion of male that is sperm and female that is egg is called fertilization, the nuclei of sperm and egg fuse to form a single nucleus called as zygote.
6) Which of the following organisms is reproduced by binary fission?
A) Cow
B) Frog
C) Amoeba
D) All of the above
Solution: [C] Amoeba
Explanation: amoeba is single celled organism, it begins the process of reproduction by the division of its nucleus into two nucleus that means two amoeba are produced from one parental amoeba these type of reproduction called as binary fission as asexual method.
7) Which of the processes ensures the continuity of life on earth?
A) Photosynthesis
B) Reproduction
C) Menstruation
D) none
Solution: [B] Reproduction
Explanation: Reproduction ensures the continuity of life on earth, because it is essential for the continuation of a special, so it very ensures the continuation of similar kinds of individuals, generation after generation.
8) Sperm are _______ in size.
A) Large
B) Very large
C) Very small
D) small
Solution: [C] Very small
Explanation: Sperm are very small in size, it’s gamete produce by male parents. Hence your answer will option {D}.
9) Which of the following is a fertilised egg?
A) Zygote
B) Ovum
C) Embryo
D) None of these.
Solution: [A] Zygote
Explanation: the cell in which fusion of male and female is produces a new baby is called zygote, it is formed after fertilisation, soft is fertilised egg. Zygote on which develops into an embryo, whole ovum is the unfertilized egg.
10) Which of the following organisms is reproduced by external fertilisation?
A) Frog
B) Starfish
C) Both (A) and (B).
D) None of these
Solution: [C] Both (A) and (B)
Explanation: both frogs and starfish are reproduced outside the female body, hence it shows external fertilisation and it is very common in aquatic animals.
11) How many nuclei present in a zygote?
A) Four
B) Three
C) Two
D) One
Solution: [D] One
Explanation: Zygote is a single cell which contains only nucleus, the nucleus of zygote is formed by the combination of nuclei of sperm and egg.
12) Find odd one out:
A) Cow
B) Human being
C) Hen
D) dog
Solution: [C] Hen
Explanation: out of the given option “Hen” is an odd one because it is the only oviparous organism which lays eggs, while human beings, dog and Cow are viviparous, they give birth to young ones.
13) Which of the following organisms show external fertilisation?
A) Frog
B) Cow
C) Dog
D) Human being
Solution: [A] Frog
Explanation: all three organisms cow, dog and human being show internal fertilisation, they take inside the female body, except one that is frog, show external fertilisation.
14) Which statement is correct among the following?
A) The zygote divides repeatedly gives rise to an embryo.
B) Human beings are viviparous.
C) Amoeba reproduce by budding
D) Every sperm is a single cell.
Solution: [C] Amoeba reproduces by budding
Explanation: all the statements are incorrect except option [C]. Amoeba is reproduced by binary fission; it divides single nuclei into two nuclei, hence it produces two amoebas from single parent amoeba. Hence it does not reproduce by budding because it does not bulge, hence it is incorrect.