Give at least 3 examples of animals which undergo internal and external fertilization?

This occurs in most bony fish, many reptiles, some cartilaginous fish, most amphibians, two mammals, and all birds.

1. What are the examples of animals that undergo external and internal fertilization?
2. What are 3 examples of external fertilization?
3. What is external fertilization give an example?
4. What is internal Fertilisation with example?
5. Is fish internal or external fertilization?
6. Is Frog internal or external fertilization?
7. What animals use internal fertilization?
8. Do reptiles have internal or external fertilization?
9. Do mammals have internal or external fertilization?
10. Do amphibians have external fertilization?
11. Are bird eggs fertilized externally?
12. Why is external fertilization disadvantageous to animals than internal fertilization?
13. Do Sharks practice internal fertilization?
14. Do fish get pregnant?
15. Does Ducks undergo external fertilization?

What are the examples of animals that undergo external and internal fertilization?

This occurs in some bony fish (like the guppy Lebistes reticulatus), some sharks, some lizards, some snakes (such as the garter snake Thamnophis sirtalis), some vipers, and some invertebrate animals (like the Madagascar hissing cockroach Gromphadorhina portentosa).

What are 3 examples of external fertilization?

Fish. Salmon, cod, trout, and char are all examples of the fish that externally fertilize. The female and male both release their gametes into the water, where they diffuse together and fertilize.

What is external fertilization give an example?

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.

What is internal Fertilisation with example?

Internal fertilization is the union of an egg and sperm cell during sexual reproduction inside the female body. ... Salamanders, spiders, some insects and some molluscs undertake internal fertilization by transferring a spermatophore, a bundle of sperm, from the male to the female.

Is fish internal or external fertilization?

Fertilization is external in most fish species. Large quantities of eggs and sperm are simultaneously released into the water by females and males. This process of egg release is termed spawning..

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 animals use internal fertilization?

Internal 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.

Do reptiles have internal or external fertilization?

Most reptiles reproduce sexually and have internal fertilization. Males have one or two penises that pass sperm from their cloaca to the cloaca of a female. Fertilization occurs within the cloaca, and fertilized eggs leave the female's body through the opening in the cloaca.

Do mammals have internal or external fertilization?

In mammals, fertilization takes place internally in the protected environment of the ampulla of the oviduct, as opposed to external fertilization where sperm and egg meet outside the parent's body (e.g., as in fish, reptiles, amphibians and invertebrates).

Do amphibians have external fertilization?

Amphibians reproduce sexually with either external or internal fertilization. Amphibians may attract mates with calls or scents. Amphibians do not produce amniotic eggs, so they must reproduce in water. Amphibian larvae go through metamorphosis to change into the adult form.

Are bird eggs fertilized externally?

Birds reproduce by internal fertilization, during which the egg is fertilized inside the female. Like reptiles, birds have cloaca, or a single exit and entrance for sperm, eggs, and waste. The male brings his sperm to the female cloaca. The sperm fertilizes the egg.

Why is external fertilization disadvantageous to animals than internal fertilization?

Disadvantage if external fertilisation is that there is less chances of meeting of sperm and ova whereas in internal fertilisation there is more chances if fertilisation. More no of sperms are delivered in external fertilisation as compared to internal fertilisation to increase efficiency of fertilisation.

Do Sharks practice internal fertilization?

Shark and batoid eggs are fertilized internally, as opposed to external fertilization in many bony fishes. Internal fertilization is a key adaptation for energy-intensive reproduction. When born or hatched, young sharks are fully formed and physically able to fend for themselves.

Do fish get pregnant?

Wild fish reproduce in various ways depending on the species of fish. In most cases, the females release eggs into the water and they are immediately fertilized by sperm from the male. In the wild, fish can easily reproduce when they sexually mature.

Does Ducks undergo external fertilization?

The reproductive system of the Duck is similar to that of the snake. It contains the testes where sperm is produced. ... External fertilization seems to be most common in early vertebrates, while internal fertilization using an intermittent organ such as the phallus in the duck seems more prevalent in later vertebrates.