Reproduction in Animals
Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.
Sexual Reproduction and Fertilization
SubtopicSexual Reproduction and Fertilization under Reproduction in Animals for Grade 8 CBSE.
Preview questions (no answers)
- 1.
Which of these animals gives birth to young ones rather than laying eggs?
A.Snake
B.Lion
C.Pigeon
D.Frog
- 2.
The fusion of gametes to form a zygote is the definition of:
A.Digestion
B.Fertilization
C.Respiration
D.Excretion
- 3.
After fertilization, the zygote begins to divide and eventually develops into an:
A.Adult
B.Embryo
C.Egg shell
D.Sperm
- 4.
The female gamete in humans is also called an:
A.Embryo
B.Ovum
C.Zygote
D.Organism
- 5.
Regardless of the animal species, the fusion of a male and female gamete always results in the formation of a:
A.Foetus
B.Zygote
C.Embryo
D.Larva
- 6.
What is a major advantage of sexual reproduction in terms of the survival of a species?
A.It requires only one parent
B.It produces offspring identical to the parent
C.It leads to variation among offspring
D.It is a very fast process
- 7.
Which of the following is NOT part of the human male reproductive system?
A.Testes
B.Sperm ducts
C.Ovaries
D.Penis
- 8.
The cell formed after the fusion of gametes is called a zygote. What is the next stage of development called as it moves towards the uterus?
A.Foetus
B.Larva
C.Embryo
D.Tadpole
- 9.
Why do millions of sperm fail to reach the egg during the journey in the human female reproductive tract?
A.Because they are all genetically identical and only one is needed.
B.Because of the acidic environment, physical barriers, and the long distance to travel.
C.Because the egg only allows sperm with a specific Y chromosome to approach.
D.Because the sperm ducts are often blocked by seminal fluid.
- 10.
Which of the following structures is responsible for the production of the female gamete?
A.Uterus
B.Oviduct
C.Ovary
D.Cervix
Download the worksheet for Reproduction in Animals - Sexual Reproduction and Fertilization to practice offline. It includes additional chapter-level practice questions.
Male and Female Reproductive Organs
SubtopicMale and Female Reproductive Organs under Reproduction in Animals for Grade 8 CBSE.
Preview questions (no answers)
- 1.
Which organ connects the fallopian tubes to the outside of the female reproductive tract?
A.Ovary
B.Uterus
C.Testis
D.Sperm duct
- 2.
Which of the following parts of the male reproductive system are paired?
A.Penis
B.Testes
C.Urethra
D.Uterus
- 3.
The human egg is a single cell that contains which of the following?
A.Only a tail
B.A nucleus and cytoplasm
C.Millions of smaller cells
D.No nucleus
- 4.
In which system do we find the 'Sperm Ducts'?
A.Female reproductive system
B.Male reproductive system
C.Digestive system
D.Excretory system
- 5.
Which of these structures in the female reproductive system is a tube-like structure?
A.Ovary
B.Uterus
C.Oviduct
D.Nucleus
- 6.
Which of the following statements about human eggs is FALSE?
A.Ovaries produce them.
B.They are single cells.
C.They are much smaller than sperm cells.
D.They contain a nucleus.
- 7.
What is the primary role of the penis in the reproductive system?
A.To produce sperm
B.To produce eggs
C.To deliver sperm into the female reproductive tract
D.To provide a site for fertilization
- 8.
Which of the following correctly describes the function of the penis in the human male reproductive system?
A.It is the site where sperms are produced
B.It is used to deliver sperms into the female reproductive tract
C.It stores the sperm until they are mature
D.It produces the hormones required for male characteristics
- 9.
What is the primary difference between a zygote and an embryo?
A.A zygote is found in males, an embryo in females
B.A zygote is a single cell; an embryo is a multicellular ball of cells
C.A zygote has all body parts; an embryo does not
D.A zygote is formed after internal fertilization; an embryo after external
- 10.
How many nuclei are involved in the process of fertilization that leads to the formation of a zygote?
A.One
B.Two
C.Four
D.Hundreds
Download the worksheet for Reproduction in Animals - Male and Female Reproductive Organs to practice offline. It includes additional chapter-level practice questions.
Development of Embryo and Foetus
SubtopicDevelopment of Embryo and Foetus under Reproduction in Animals for Grade 8 CBSE.
Preview questions (no answers)
- 1.
Which stage of development is described as a 'developing ball of cells' that has not yet reached the foetal stage?
A.Zygote
B.Embryo
C.Foetus
D.Adult
- 2.
A major characteristic of viviparous animals is that they:
A.Give birth to young ones
B.Lay eggs with hard shells
C.Lay eggs in water
D.Have external fertilization
- 3.
The process of transformation from a single-celled zygote to a multicellular embryo involves:
A.Single division
B.Metamorphosis
C.Growth without division
D.Repeated cell division
- 4.
What type of reproduction results in the formation of an embryo that develops into a foetus?
A.Asexual reproduction
B.Budding
C.Sexual reproduction
D.Binary fission
- 5.
Which of the following describes the correct transition of the zygote in a viviparous animal?
A.Zygote → Foetus → Embryo
B.Zygote → Embryo → Foetus
C.Embryo → Zygote → Foetus
D.Foetus → Embryo → Zygote
- 6.
During which stage of development is the 'species' of the animal easiest to identify based on physical appearance?
A.Zygote
B.Embryo
C.Foetus
D.Cellular stage
- 7.
What happens to the 'ball of cells' as it travels from the oviduct to the uterus in humans?
A.It stops dividing.
B.It continues to divide and increase in cell number.
C.It shrinks in size.
D.It develops a hard calcium shell.
- 8.
If you were to compare a zygote, an embryo, and a foetus, which would have the highest degree of cellular complexity and specialization?
A.Zygote
B.Embryo
C.Foetus
D.All have the same complexity
- 9.
During the journey of a human embryo, what occurs specifically after it is embedded in the uterine wall?
A.It travels back up to the ovary
B.It begins to form groups of cells that develop into different tissues and organs
C.It stops all cellular activity until birth
D.It transforms back into a single-celled zygote
- 10.
Which of the following is the correct definition of an embryo in the context of animal reproduction?
A.The stage of development where the organism is still a single cell
B.The stage of development where body parts are completely identifiable
C.The early stage of development after the zygote has started dividing but before major organs are fully visible
D.The stage immediately following the birth of the offspring
Download the worksheet for Reproduction in Animals - Development of Embryo and Foetus to practice offline. It includes additional chapter-level practice questions.
Viviparous and Oviparous Animals
SubtopicViviparous and Oviparous Animals under Reproduction in Animals for Grade 8 CBSE.
Preview questions (no answers)
- 1.
Which of the following is an example of an oviparous reptile?
A.Tiger
B.Tortoise
C.Rabbit
D.Blue Whale
- 2.
A dolphin is an aquatic animal that gives birth to young ones. It is classified as:
A.Oviparous
B.Viviparous
C.Cold-blooded
D.A fish
- 3.
The eggs of which of these animals lack a hard protective shell?
A.Snake
B.Lizard
C.Frog
D.Hen
- 4.
Which of the following animals is VIVIPAROUS?
A.Eagle
B.Goldfish
C.Monkey
D.Silkworm
- 5.
Which category of animals includes both humans and dogs?
A.Oviparous
B.Viviparous
C.Amphibians
D.Reptiles
- 6.
Which statement about the development of a chick is correct?
A.The hen lays the egg as soon as fertilization occurs
B.The zygote divides and travels down the oviduct, forming protective layers before being laid
C.The chick is born fully developed without a shell
D.The chick develops entirely through external fertilization
- 7.
In the context of Grade 8 science, which of these is an example of a viviparous animal found in the ocean?
A.Dolphin
B.Sea turtle
C.Starfish
D.Salmon
- 8.
Which of the following logic explains why most land animals use internal fertilization regardless of whether they are oviparous or viviparous?
A.To ensure the sperm can reach the egg in a liquid medium without drying out.
B.Because external fertilization only works for mammals.
C.Internal fertilization is faster than external fertilization.
D.It allows the mother to choose the color of the offspring.
- 9.
In the life cycle of a butterfly, the transition from larva to pupa involves a hard covering. Is this butterfly considered viviparous during this stage?
A.Yes, because the pupa is alive.
B.No, it remains oviparous as it hatched from an egg and developed externally.
C.Yes, because it undergoes metamorphosis.
D.No, because it does not have a heart.
- 10.
Why is the mortality rate of the 'young ones' generally higher in oviparous species that do not provide parental care?
A.The young ones are born with diseases.
B.They are exposed to environmental hazards and predators without protection.
C.They do not have enough DNA.
D.They cannot breathe.
Download the worksheet for Reproduction in Animals - Viviparous and Oviparous Animals to practice offline. It includes additional chapter-level practice questions.
Asexual Reproduction in Animals
SubtopicAsexual Reproduction in Animals under Reproduction in Animals for Grade 8 CBSE.
Preview questions (no answers)
- 1.
Amoeba is a:
A.Multicellular animal
B.Single-celled animal
C.Plant
D.Fungus
- 2.
The process of produce exact copies of a living part or a complete organism is:
A.Budding
B.Cloning
C.Binary fission
D.Fertilization
- 3.
In the final stage of binary fission in Amoeba, we have:
A.A single larger Amoeba
B.A zygote
C.Two independent daughter Amoebae
D.A cluster of spores
- 4.
Binary fission is considered asexual because:
A.It occurs in water
B.It involves only one parent cell
C.It is a very slow process
D.It produces eggs
- 5.
In which type of environment is binary fission typically observed in Amoeba?
A.Dry desert sand
B.Extreme freezing temperatures
C.Freshwater ponds and moist soil
D.Deep sea salt water only
- 6.
During the cloning process, once the nucleus is inserted into the egg cell, what must happen next for it to become an embryo?
A.It must be frozen immediately
B.It must be stimulated to begin dividing
C.It must be fertilized by a sperm cell
D.It must be injected with vitamins
- 7.
The offspring of a Hydra produced by budding will have:
A.Half the number of chromosomes as the parent
B.Double the number of chromosomes as the parent
C.The same number of chromosomes as the parent
D.A random number of chromosomes
- 8.
In the diagram provided, what biological event is occurring at point Z?
A.The bud is becoming a parasite
B.The bud is detaching to live as an independent organism
C.The parent is dying to provide food for the bud
D.The bud is fusing with another Hydra to reproduce sexually
- 9.
Why do cloned animals like Dolly often show signs of premature aging or health problems?
A.They are born without an immune system
B.The 'age' of the donor nucleus DNA might be carried over to the clone
C.The surrogate mother's body rejects the clone's organs
D.They do not have enough mitochondria in their cells
- 10.
What is the primary difference between the offspring produced by budding and those produced by binary fission?
A.Budding offspring are initially much smaller than the parent, while fission produces two roughly equal-sized cells
B.Fission offspring are genetically different, while budding offspring are clones
C.Budding involves two parents, while fission involves only one
D.Fission only happens in plants, while budding only happens in animals
Download the worksheet for Reproduction in Animals - Asexual Reproduction in Animals to practice offline. It includes additional chapter-level practice questions.