What is external fertilization short answer?

What is external fertilization short answer?

External fertilization. Fusion of male and female gametes takes place inside the body. Fusion of male and female gametes take place outside the body. A female partner lays fertilized eggs or a fully grown young one. The female partner lays unfertilized eggs.

What is external fertilization example?

Descriptive external fertilisation 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. In the list of external fertilization examples, aquatic animals such as mammals and sharks are exceptions.

What does external fertilization mean in biology?

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 fertilization give 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 difference between internal and 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 Animals use external fertilization?

Among vertebrates, external fertilization is most common in amphibians and fish. Invertebrates utilizing external fertilization are mostly benthic, sessile, or both, including animals such as coral, sea anemones, and tube-dwelling polychaetes. Benthic marine plants also use external fertilization to reproduce.

What is fertilization and its types Class 12?

Fertilization in Animals The process of fusion of sperm with egg (ovum) to produce zygote is called fertilization. Animals also produce gametes for fusion. But the fusion of gametes may take place inside or outside the body. Based on this, fertilization is of two types – internal and external fertilization.

What is 12th implantation?

Hint: Implantation is the term which is for the process of attachment of blastocyst, which is the stage of an embryo formed in the fallopian tube travels to the uterus and attached to the endometrium of the uterine wall, and this happens after 7th day of fertilization.

What are the disadvantages of external fertilization?

Disadvantages of External Fertilization A large number of gametes are left unfertilized and wasted. Predators and other environmental hazards reduce the chances of fertilization. The sperm might not necessarily come in contact with the eggs. The gametes or the zygote dessicate.

What would be an example of internal fertilization?

Internal Fertilization. Animals that use internal fertilization specialize in the protection of the developing egg. For example, reptiles and birds secrete eggs that are covered by a protective shell that is resistant to water loss and damage.

What are the similarities of internal external fertilization?

Similarities Between Internal and External Fertilization Both internal and external fertilization are mechanisms of fusing female gametes with male gametes. Both internal and external fertilization occurs in animals as well as plants. Mobile sperms and immobile egg cells are produced in both

Do Plants use external fertilization?

Invertebrates utilizing external fertilization are mostly benthic, sessile, or both, including animals such as coral, sea anemones, and tube-dwelling polychaetes. Benthic marine plants also use external fertilization to reproduce. Environmental factors and timing are key challenges to the success of external fertilization.