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Class 10 Science Chapter 7 Practice Question Answers - How Do Organisms Reproduce

Fill in the Blanks 

Q1. The _________ is also called womb.

Ans: Uterus
Explanation:
The uterus is a muscular organ in females where a fertilized egg implants and develops into a fetus during pregnancy.

Q2. The _________ is primary reproductive organ in male.

Ans: Testis
Explanation: The testes are the primary reproductive organs in males that produce sperm and the hormone testosterone.

Q3. The _________ is connecting structure which helps in the transfer of substance to and from the foetus body.

Ans: Placenta
Explanation: The placenta connects the fetus to the uterine wall, allowing the exchange of nutrients, oxygen, and waste between the mother and fetus.

Q4. The process of laying eggs in a large number is called _________.

Ans: Super ovulation
Explanation: Super ovulation is the process in which multiple eggs are released at the same time, common in animals that lay numerous eggs.

Q5. _________ is the primary reproductive organ in females.

Ans: Ovary
Explanation: The ovaries are the primary reproductive organs in females that produce eggs and hormones like estrogen and progesterone.

Q6. Testes produce _________.

Ans: Testosterone
Explanation: Testosterone is a hormone produced by the testes that is responsible for male secondary sexual characteristics and sperm production.

Q7. The cells involved in sexual reproduction are called _________.

Ans: Germ cells
Explanation: Germ cells are reproductive cells (sperm and eggs) that fuse during fertilization to form a new organism.

Q8. In animals like fish and frog _________ fertilization take place.

Ans: External
Explanation: External fertilization occurs outside the body, where eggs and sperm are released into the water for fertilization.

Q9. The human zygote gets implanted in the _________.

Ans: Uterus
Explanation: After fertilization, the zygote travels to the uterus and implants itself in the uterine lining to develop into an embryo.

Q10. IVF stands for _________.

Ans: In vitro fertilization
Explanation: IVF is a medical procedure where an egg is fertilized by sperm outside the body and then implanted into the uterus.

Choose True and False Statements

Q1: Internal fertilization takes place outside the female's body.

Ans: False
Explanation: Internal fertilization occurs inside the female's body, where sperm fertilizes the egg.

Q2: Birds and snakes are oviparous animals.

Ans: True
Explanation: Oviparous animals lay eggs that hatch outside the mother’s body.

Q3: A tadpole is the young one of a frog.

Ans: True
Explanation: A tadpole is the larval stage of a frog, which later undergoes metamorphosis to become an adult frog.

Q4: Animals like Amoeba multiply by budding.

Ans: False
Explanation: Amoeba reproduces by binary fission, not budding. Budding is seen in organisms like Hydra.

Q5: The fusion of male and female sex cells is called fertilization.

Ans: True
Explanation: Fertilization is the process where a male sperm cell fuses with a female egg cell to form a zygote.

Match the Columns

Class 10 Science Chapter 7 Practice Question Answers - How Do Organisms Reproduce

Answer:

1. Tapeworm - (e) Hermaphrodite
Tapeworms have both male and female reproductive organs, making them hermaphrodites.

2. Vasectomy - (d) Vas deferens:
 Vasectomy is a surgical procedure that blocks the vas deferens to prevent sperm release.

3. Copper-T - (c) IUCD
Copper-T is an intrauterine contraceptive device used to prevent pregnancy.

4. Implantation - (a) Uterus: 
Implantation occurs when the fertilized egg attaches to the lining of the uterus.

5. AIDS - (b) STD
AIDS is a sexually transmitted disease caused by the HIV virus.

    

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FAQs on Class 10 Science Chapter 7 Practice Question Answers - How Do Organisms Reproduce

1. How do organisms reproduce?
Ans. Organisms reproduce through the process of reproduction, which involves the production of offspring from parent organisms. There are two main types of reproduction - sexual and asexual. Sexual reproduction involves the fusion of male and female gametes, resulting in genetic variation among the offspring. Asexual reproduction, on the other hand, does not involve the fusion of gametes and leads to the production of genetically identical offspring.
2. What is the difference between sexual and asexual reproduction?
Ans. Sexual reproduction involves the fusion of male and female gametes, resulting in offspring with genetic variation. This variation is beneficial as it helps organisms adapt to changing environments and survive. Asexual reproduction, on the other hand, does not involve the fusion of gametes and leads to the production of genetically identical offspring. This lack of genetic variation can be disadvantageous in changing environments, but asexual reproduction is advantageous in stable environments as it allows for rapid reproduction.
3. What are the advantages of sexual reproduction?
Ans. Sexual reproduction offers several advantages. Firstly, it leads to genetic variation among offspring, which enhances the adaptability and survival of a species. Genetic variation allows for the development of new traits and the ability to better withstand changes in the environment. Secondly, sexual reproduction promotes the elimination of harmful genetic mutations through the process of natural selection. This helps maintain the overall health and fitness of a species.
4. What are the advantages of asexual reproduction?
Ans. Asexual reproduction offers certain advantages. Firstly, it allows for rapid reproduction since there is no need to find a mate or invest energy in producing gametes. This can be beneficial in stable environments where there is no significant change. Secondly, asexual reproduction guarantees the production of genetically identical offspring, ensuring the preservation of favorable traits and characteristics. This can be advantageous in environments where the current traits are well-suited for survival.
5. Can organisms switch between sexual and asexual reproduction?
Ans. Some organisms have the ability to switch between sexual and asexual reproduction depending on the environmental conditions. This phenomenon is known as facultative parthenogenesis. For example, certain reptiles can reproduce asexually when there is a lack of suitable mates, but can also reproduce sexually when mates are available. However, it is important to note that not all organisms have the capability to switch between these two modes of reproduction.
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