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Answer. external fertilization is a case in which fusion of male and female gametes takes place in outside environment/ medium and not in the body of the female . for example, in case of frogs , fertilization takes place in water medium . the female releases eggs in the water at the same time sperms are released too.Solution : (1) If the fertilisation occurs outside the body of the female organism then it is called external fertilisation. <br> (2) The female lays a lagre number of eggs in water and at the same time male releases some millions of sperms on to them in water.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.
What is external fertilization explain with an example?
Solution : (1) If the fertilisation occurs outside the body of the female organism then it is called external fertilisation. <br> (2) The female lays a lagre number of eggs in water and at the same time male releases some millions of sperms on to them in water.
What is external fertilization give Example Class 8?
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 Fertilisation – Reproduction in animals (CBSE Grade 08 Biology)
Images related to the topicExternal Fertilisation – Reproduction in animals (CBSE Grade 08 Biology)
What is meant external fertilization?
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. It is contrasted with internal fertilization, in which sperm are introduced via insemination and then combine with an egg inside the body of a female organism.
What is external fertilization give Example Class 12?
Examples of External Fertilization
Their spawning is synchronized to prevent the eggs and sperms from diluting or drifting away. The female releases the eggs into the water. The male also releases the sperms in the water to fertilize them. The larval life of the frogs is in water, whereas the adult life is on land.
What is meant by internal fertilization and external fertilization explain with examples?
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 meant by external fertilization name two animals?
The union takes place outside of the body, and is called external fertilization. Many fish, amphibians, and other sexual aquatic animals use external fertilization (the exceptions are aquatic mammals, sharks, and some other special types of fish).
What is fertilization for Class 7th?
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.
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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.
External Fertilization- Advantages, Disadvantages & Examples
External fertilization occurs outside the body of an organism. Frogs, sea urchins, starfish exhibit external fertilization.
External and Internal Fertilization | Biology for Majors II
External fertilization usually occurs in aquatic environments where both eggs and sperm are released into the water. After the sperm reaches the egg, …
Give examples and explain what is meant by external … – Toppr
When the eggs are fertilized external to the female body or soon after being released by the female into the external medium the process is known as …
What animals is external fertilization?
Most fish, bivalves (like clams), and crustaceans, like this peacock mantis shrimp, use external fertilization.
Internal vs. External Fertilization (IB Biology)
Images related to the topicInternal vs. External Fertilization (IB Biology)
Why is external fertilization?
External fertilization in an aquatic environment protects the eggs from drying out. Broadcast spawning can result in a greater mixture of the genes within a group, leading to higher genetic diversity and a greater chance of species survival in a hostile environment.
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 are some examples of internal fertilization?
| Internal Fertilization | External Fertilization |
|---|---|
| Examples | |
| Reptiles, Birds, Mammals, Tracheophytes, Pteridophytes | Algae, Fish, Amphibians |
What is the difference between internal and external fertilization Class 8?
The main difference between internal and external fertilization is that internal fertilization occurs inside the female organism whereas external fertilization occurs outside the female organism.
Is frog internal or external fertilization?
In most species of frogs, fertilization is external. The male frog grabs the female’s back and fertilizes the eggs as the female frog releases them (Figure 2.2B). Rana pipiens usually lays around 2500 eggs, while the bullfrog, Rana catesbiana, can lay as many as 20,000.
What is the difference between internal & external fertilization?
Complete answer: Internal fertilization is the process when the syngamy (union of male and female gamete) occurs inside the female body after insemination using copulation. In contrast, External fertilization is the syngamy outside the female body, that is in the outer environment especially in water bodies.
What is CBSE 10th fertilisation?
Fertilisation is the process of fusion of male and female gametes. For the fusion of male and female gametes pollen grains have to reach the surface of the stigma. This is called pollination. Pollen grains received by the stigma, germinate and give rise to pollen tubes.
Difference Between External Fertilization and Internal Fertilization – Reproduction in Organisms
Images related to the topicDifference Between External Fertilization and Internal Fertilization – Reproduction in Organisms
What is pollination Class 8?
What is Pollination? Pollination is a method where pollen grains are picked from an anther, which is the male part of a flower and transferred to the flower’s female part called the stigma. To make the pollination work successfully, the pollen grains must be transferred from the same species of flower.
What is pollination Class 12?
Pollination: It is the process of transfer of the pollen grains from the anther to the stigma of a flower. The androecium is the male reproductive organ of a flower while the gynoecium is the female reproductive organ of a flower.
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