Conclusion – External Fertilization

What is External Fertilization?

External fertilization is a widespread reproductive method that takes place in the aquatic environment. The fertilization method takes place during the process of spawning where the females release their eggs and the male releases sperm in the same area and same time. External fertilization takes place in crabs, shrimps, oysters, squid, sea urchins, and sea cucumbers....

Characteristics of External Fertilization

The features of external fertilization are as follows:...

External Fertilization Examples

Many aquatic species follow the external fertilization process. Some of them are:...

External Fertilization Process

The reproductive process where the male gamete sperm fuses with the female gamete ovum outside the female body. The steps involved in this process are:...

Advantages of External Fertilization

External fertilization has certain advantages:...

Disadvantages of External Fertilization

Although external fertilization has many advantages it also has certain disadvantages, like:...

External Fertilization in Humans

External fertilization is also seen among humans but it is not natural. When the female’s oviducts are blocked the sperm cannot reach the eggs to fertilize it. In this situation the doctors collect the eggs and sperm and keep it together for several hours for the fertilization to take place this is known as in-vitro fertilization. After fertilization, the zygote is transferred into the uterus of the female after a week and the development takes place inside the body of the female....

External Fertilization in Plants

In plants external fertilization is very evident in primitive forms like algae and mosses where the male gametes are released into the environment and they finally reach the egg cell through chemotaxis. When fertilization occurs, the zygote develope individually independent of the mother plant. Pollination is also sometimes considered as an advnce form of external fertilization where the pollen is carried by an agent to the female plant....

External Fertilization in Fish

Fishes usually exhibit external fertilization. In this process the female fish lays egg in water and the male fertilizes it by releasing sperms on the cluster of egg. Once fertilization is successful, the male parent cares for the egg until they hatch....

Difference Between Internal and External Fertilization

The difference between internal and external fertilization in points is listed below:...

Conclusion – External Fertilization

External fertilization is the method of fertilization that takes place outside the female body. Here, the male and the female gametes are released into the aquatic environment and the fusion takes place. This type of fertilization is seen among aquatic organisms like fish and amphibians. External fertilization has high productive output and genetic diversity but it also has significant risks and challenges for the survival of offspring....

FAQs on External Fertilization

What are Internal and External Fertilization?...