What is the advantage and disadvantage of internal and external fertilization?

What is the advantage and disadvantage of internal and external fertilization?

Internal fertilization Increase chance gametes meet and greater change of successful fertilisation. More protection against outside environments and predators, and therefore a higher chance of surviving until birth. More selective of their mates. Less chance of desiccation of gametes.

What is the advantage of external reproduction?

Advantages of External Fertilization It results in increased genetic variations. It produces a larger number of offsprings. The gametes released can drift and therefore it is easy to find mates.

What is internal and external development?

External Fertilization. When fertilization takes place outside an animals body. Water is usually needed in order for the sperm to swim to the egg. Internal Development. When embryo/fetus develops inside an animal’s body.

What is external and internal fertilization in animal?

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.

Why internal fertilization is advantages compared to external fertilization?

Internal fertilization has the advantage of protecting the fertilized egg from dehydration on land. The embryo is isolated within the female, which limits predation on the young. Fewer offspring are produced through this method, but their survival rate is higher than that for external fertilization.

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.

Why is internal development better than external?

The main advantage of external growth over internal growth is that the former provides a faster way to expand the business. However, organic growth is widely regarded as a better measure of a company’s performance than external growth.

What are the advantages of internal fertilization check all that apply?

It provides protection from the environment It provides protection from predators. It can be utilized by terrestrial or aquatic creatures Proximity of sperm and eggs is guaranteed.

Where does internal development occur in a mammal?

Internal Development. • Internal Development occurs in mammal inside female 1. Placental – mammals that possess an internal structure that forms joining of embryo and mother (mice, cats dogs, whale, human) • Allows for longer internal development • Exchange of O2, CO2 & nutrients between mother and embryo.

Which is an example of internal and external development?

By contrast, external development refers to changes that are tangentially related to sexual development but are specific to other, non-sexual organs. Humans going through puberty are an excellent example of both types of development. The growth of the female sexual reproductive system, including the ovaries, is a form of internal development.

Where does external fertilization occur in a fish?

• External fertilization occurs outside of female parent – Fish – Amphibians – Aquatic vertebrates External Fertilization • Produce many eggs in water because: – Eggs are laid in the water – There is no parental care – Fertilization & development occur outside the female body Internal Fertilization

Why is external fertilization a disadvantage for most animals?

It is a reproductive disadvantage for most of the animals because most of the gametes die without being fertilized. External fertilization is, however, a simple reproductive strategy which does not require the involvement of any hormones or mating rituals.