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What Is External Fertilisation 8Th? The 12 Correct Answer

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Type of fertilisation in which the fusion of male gamete and a female gamete takes place outside its body is called external fertilisation. Though the animals like frog and fish which undergo external fertilisation, lay hundreds of eggs , all the eggs do not get fertilised and hence do not develop into new frogs.External fertilization is the process in which the fusion of the male and the female gamete takes place outside the female body in an external medium, generally water. Fish, frog, starfish are some organisms that exhibit external fertilization.External fertilization is characterized by the release of both sperm and eggs into an external environment; sperm will fertilize the egg outside of the organism, as seen in spawning.

What Is External Fertilisation 8Th?
What Is External Fertilisation 8Th?

Table of Contents

What is meant by external fertilization Class 8?

External fertilization is the process in which the fusion of the male and the female gamete takes place outside the female body in an external medium, generally water. Fish, frog, starfish are some organisms that exhibit external fertilization.

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What is external fertilization?

External fertilization is characterized by the release of both sperm and eggs into an external environment; sperm will fertilize the egg outside of the organism, as seen in spawning.


External Fertilisation – Reproduction in animals (CBSE Grade 08 Biology)

External Fertilisation – Reproduction in animals (CBSE Grade 08 Biology)
External Fertilisation – Reproduction in animals (CBSE Grade 08 Biology)

Images related to the topicExternal Fertilisation – Reproduction in animals (CBSE Grade 08 Biology)

External Fertilisation - Reproduction In Animals (Cbse Grade 08 Biology)
External Fertilisation – Reproduction In Animals (Cbse Grade 08 Biology)

Why is external fertilization?

They do it by releasing eggs or sperm into the water, in the hopes that the cells will find each other and the eggs will be fertilized. Most aquatic organisms that reproduce sexually use this method of fertilization. Because it happens outside of the body, we call this “external fertilization”.

What is fertilization for 8th class?

Answer: Fertilization is the fusion of male and female gametes to produce a new organism. Fusion of male and female gametes occur inside the female’s body. Fusion of male and female gametes occur outside.

What is meant by internal and external fertilization?

Internal fertilization happens inside the body, for example, mammals having sex or artificial insemination to create an embryo. External fertilization happens outside the body, for example, fish spawning in a river or in vitro fertilization. Biology.

What is external fertilization 10th?

Fertilization that occurs outside the body of an organism is known as external fertilization. It usually requires a water body for successful fertilization. The sperms and eggs are released in an external environment.

Is external fertilization asexual?

Asexual reproduction in animals occurs through fission, budding, fragmentation, and parthenogenesis. Sexual reproduction may involve fertilization inside the body or in the external environment.


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External Fertilization- Advantages, Disadvantages & Examples

Fertilization that occurs outside the body of an organism is known as external fertilization. It usually requires a water body for successful fertilization.

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External fertilization – Wikipedia

External fertilization is a mode of reproduction in which a male organism’s sperm fertilizes a female organism’s egg outside of the female’s body.

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Q9 Differentiate between internal fertilisation and external …

NCERT Solutions Class 8 Science Solutions for Exercise in Chapter 9 – Reproduction in Animals ; Fusion of male and female gametes takes place inside the body.

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Internal and External Fertilization – Meaning and Difference

What is Fertilization?Fusion of sperm with egg to form zygote is called fertilization,During fertilization,the nuclei of the sperm and the …

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Which animal has external fertilization?

In oviparity, fertilized eggs are laid outside the female’s body and develop there, receiving nourishment from the yolk that is a part of the egg. This occurs in most bony fish, many reptiles, some cartilaginous fish, most amphibians, two mammals, and all birds.

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What is internal fertilization explain with example?

Explanation. When fertilisation happens inside the body of the organism then it is named as internal fertilisation. The internal fertilisation happens only in those animals which hold specialized sex organs for receiving and transmitting the sperms. For example: reptiles, mammals, birds as well as angiosperms, etc.

What are the two types of fertilization?

Fertilization is necessary for all organisms that reproduce sexually and there are two mechanisms by which fertilization can take place. These include external fertilization in which eggs are fertilized outside of the body and internal fertilization in which eggs are fertilized within the female reproductive tract.


Class 8| External Fertilization | NCERT | Science | CBSE Board | Home Revise

Class 8| External Fertilization | NCERT | Science | CBSE Board | Home Revise
Class 8| External Fertilization | NCERT | Science | CBSE Board | Home Revise

Images related to the topicClass 8| External Fertilization | NCERT | Science | CBSE Board | Home Revise

Class 8| External Fertilization | Ncert | Science | Cbse Board | Home Revise
Class 8| External Fertilization | Ncert | Science | Cbse Board | Home Revise

Why does external fertilization produce more eggs?

After the sperm reaches the egg, fertilization takes place. Most external fertilization happens during the process of spawning where one or several females release their eggs and the male(s) release sperm in the same area, at the same time.

What is fertilization 7th class?

Fertilization is the process of fusion of pollen, the male gamete and egg, the female gamete. Fertilization results in the formation of a zygote. Zygote is one celled stage of an individual which divides to form embryo.

What is fertilization short answer?

Fertilization: The process of combining the male gamete, or sperm, with the female gamete, or ovum. The product of fertilization is a cell called a zygote.

What is fertilization difference between external fertilization and internal fertilization?

Differentiate between internal fertilization and external fertilization.
Internal Fertilization External Fertilization
Fertilization of male and female gametes takes place inside female body Fertilization of male and female gametes takes place outside female body
11 thg 6, 2021

What is a zygote Class 8?

A zygote is the first diploid cell that is formed by the fusion of male and female gametes resulting in the formation of an embryo. The zygote stage development occurs in the first week of fertilization.

What is external fertilisation give example?

Descriptive external fertilization examples are that of salmon, trout fish, and codfish. Both the female and male release their eggs and sperms respectively into the water where they diffuse and fertilize.

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What is external fertilization with Example Class 12?

In this type of fertilization, syngamy occurs outside the body of organism. Example- in most aquatic organisms like algae, fish, amphibians. The major disadvantage of external fertilization is they produce a large number of off springs but the off springsare vulnerable to predators.

What is internal fertilization in biology?

Internal fertilization is the process of fertilization that occurs inside the body of an individual. It occurs mostly in land animals. For internal fertilization to occur there needs to be a method for the introduction of male sperms into the female reproductive tract.

How does external fertilization take place?

Most external fertilization happens during the process of spawning where one or several females release their eggs and the male(s) release sperm in the same area, at the same time. The release of the reproductive material may be triggered by water temperature or the length of daylight.


Fertilisation Process | Reproduction in Animals | Don’t Memorise

Fertilisation Process | Reproduction in Animals | Don’t Memorise
Fertilisation Process | Reproduction in Animals | Don’t Memorise

Images related to the topicFertilisation Process | Reproduction in Animals | Don’t Memorise

Fertilisation Process | Reproduction In Animals | Don'T Memorise
Fertilisation Process | Reproduction In Animals | Don’T Memorise

What is informal fertilization?

In vitro fertilization (IVF) is a set of procedures designed to treat fertility or genetic problems and thus assist with the conception of a child. This process involves the collection of mature eggs from your ovaries. Outside of the womb, these eggs are then combined with sperm and fertilized in a laboratory.

What is plant Fertilisation?

In plants, fertilization is a process of sexual reproduction, which occurs after pollination and germination. Fertilization can be defined as the fusion of the male gametes (pollen) with the female gametes (ovum) to form a diploid zygote. It is a physicochemical process which occurs after the pollination of the carpel.

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