NCERT Class 8 Science — Chapter 3: Reproduction in animals

Consider the following statements distinguishing Viviparous and Oviparous animals: 1. Viviparous animals are those that lay eggs. 2. Oviparous animals lay eggs which later develop into young ones. 3. Frogs and hens are examples of oviparous animals. Which of the statements given above is/are correct?

Consider the following statements about the female reproductive system: 1. Oviducts are also known as fallopian tubes. 2. The uterus is a paired structure located on either side of the abdomen. 3. Fertilisation usually takes place in the oviduct. Which of the statements given above is/are correct?

In the context of developmental biology, the term "embryo" refers to:

Consider the following statements about the Zygote: 1. It is the first cell of a new individual. 2. It contains genetic material exclusively from the mother. 3. It is formed by the division of the embryo. Which of the statements given above is/are correct?

Which one of the following organisms reproduces through the asexual method known as budding?

In the context of human reproduction, what is the primary distinction between a zygote and a foetus?

With reference to "Test-tube babies", consider the following statements: 1. The fertilisation takes place outside the female body. 2. The complete development of the baby takes place in a test tube. 3. The zygote is allowed to develop for about a week outside before being placed in the uterus. Which of the statements given above is/are correct?

With reference to the life cycle of a frog, consider the following statements: 1. The tadpole is the larval stage of the frog. 2. The tadpole looks very similar to the adult frog. 3. The transformation of the larva into an adult is called binary fission. Which of the statements given above is/are correct?

With reference to the social organisation in a honey bee hive, consider the following statements: 1. The queen bee is responsible for building the hive. 2. Worker bees are females responsible for building the hive. 3. Drones are male bees that develop from unfertilised eggs. Which of the statements given above is/are correct?

In the context of hen reproduction, consider the following statements: 1. Hens undergo internal fertilisation. 2. The hard shell of the egg is formed after the egg is laid. 3. The embryo takes about 3 weeks to develop into a chick. Which of the statements given above is/are correct?

Consider the following statements regarding asexual reproduction: 1. It involves only a single parent. 2. Hydra reproduces by a method called binary fission. 3. Amoeba reproduces by a method called binary fission. Which of the statements given above is/are correct?

With reference to reproduction in Hydra, consider the following statements: 1. New individuals develop as outgrowths called buds. 2. The buds formed in Hydra never detach from the parent body. 3. This is a form of sexual reproduction. Which of the statements given above is/are correct?

In the life cycle of organisms such as silkworms and frogs, the intermediate stage that is morphologically distinct from the adult is known as:

Consider the following statements regarding external fertilisation: 1. It is the primary mode of reproduction in terrestrial mammals like cows and humans. 2. The female lays eggs inside the water, and the male deposits sperms over them. 3. The eggs are held together by a layer of jelly that provides protection. Which of the statements given above is/are correct?

The lateral outgrowths observed on the body of Hydra during reproduction are known as:

Which one of the following is a defining characteristic of viviparous animals?

Which of the following is a correct similarity between a hen's egg and a human ovum?

With reference to the development of the embryo in humans, consider the following statements: 1. The embryo gets embedded in the wall of the uterus for further development. 2. The stage where body parts like hands and eyes can be identified is called the zygote. 3. The embryo completes its full development into a baby within the fallopian tube. Which of the statements given above is/are correct?

Aquatic animals such as frogs and fish lay hundreds of eggs, whereas animals like hens lay one at a time. What is the primary reason for this difference?

Which one of the following is the correct chronological sequence of development stages? 1. Foetus 2. Zygote 3. Embryo 4. Ball of cells Select the correct answer using the code given below:

"IVF" or In Vitro Fertilisation is a technique used when:

With reference to the development of a chick, which one of the following statements is correct?

Which of the following pairs is correctly matched?

The biological process of metamorphosis is a characteristic feature of which one of the following organisms?

With reference to the cloning of the sheep 'Dolly', which one of the following statements is correct?

In a honey bee hive, what determines whether an egg develops into a female or a male (drone)?

In human reproduction, what occurs immediately after the formation of a zygote?

Consider the following pairs regarding reproduction methods: 1. Binary Fission : Amoeba 2. Budding : Yeast 3. Internal Fertilisation : Fish Which of the pairs given above is/are correctly matched?

From a biological perspective, why is the development of a human infant into an adult not classified as metamorphosis?

Consider the following statements about "Binary Fission": 1. It is a method of asexual reproduction. 2. It is observed in multicellular organisms like Hydra. 3. It involves the division of the body followed by the division of the nucleus. Which of the statements given above is/are correct?

In human anatomy, the structure that transports the ovum from the ovary to the uterus is known as:

Which one of the following represents the correct sequence of stages in the life cycle of a frog?

Which of the following statements is correct regarding the offspring of the cloning process (Dolly)?

During the process of fertilisation, what happens to the nuclei of the sperm and the ovum?

Consider the following statements about the size of eggs in animals: 1. All animal eggs are microscopic. 2. The ostrich egg is the largest. 3. Hen's eggs are large enough to be seen without a microscope. Which of the statements given above is/are correct?

In the context of human reproduction, the term "implantation" refers to: