What are two groups of animals that fertilize externally?

Among vertebrates, external fertilization is most common in amphibians and fish.

1. What are the two types of animal fertilization?
2. What is external fertilization example?
3. Which of the following is external fertilization?
4. Do reptiles have external fertilization?
5. Do Frogs do external fertilization?
6. Do birds use external fertilization?
7. Is fish internal or external fertilization?
8. Is Dog internal or external fertilization?
9. Are chicken eggs fertilized externally?
10. Where does external fertilization occur?
11. Why do you think external fertilization occurs generally in aquatic animals not terrestrial animals?
12. What are the examples of animals that undergo internal fertilization?
13. Do amphibians have internal or external fertilization?
14. How are mammals different from other groups of animals?

What are the two types of animal fertilization?

The fusion of a sperm and an egg is a process called fertilization. This can occur either inside (internal fertilization) or outside (external fertilization) the body of the female.

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.

Which of the following is external fertilization?

Answer: 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.

Do reptiles have 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 Frogs do 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).

Do birds use external fertilization?

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.

Is fish internal or external fertilization?

Most fish species spawn eggs that are fertilized externally, typically with the male inseminating the eggs after the female lays them.

Is Dog internal or external fertilization?

When we think about organisms mating, often we think of animals around us—humans, dogs, dragonflies, cats, lizards, or maybe birds. When these animals mate with each other, the egg and sperm meet inside the body, not outside in the air or water.

Are chicken eggs fertilized externally?

Chickens — like other birds — lay fertilized eggs via sexual reproduction.

Where does external fertilization occur?

External fertilization in animals usually occurs in water or in damp areas in a process called spawning. Moisture in the environment keeps the gametes from drying out. Moisture is also important so the eggs and sperm can move around freely, which lets them meet and fuse.

Why do you think external fertilization occurs generally in aquatic animals not terrestrial animals?

External fertilisation of the female gamete by the male gamete takes place mostly in water; because water facilitates: extended period of gamete survival and easy movement of sperms towards egg.

What are the examples of animals that undergo internal fertilization?

Internal Fertilization

This occurs in most bony fish, many reptiles, some cartilaginous fish, most amphibians, two mammals, and all birds. Reptiles and insects produce leathery eggs, while birds and turtles produce eggs with high concentrations of calcium carbonate in the shell, making them hard.

Do amphibians have internal or external fertilization?

These changes prepare it for life on land as an adult frog. 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.

How are mammals different from other groups of animals?

Mammals have hair or fur; are warm-blooded; most are born alive; the young are fed milk produced by the mother's mammary glands; and they have a more complex brain than other animals. 2. How do mammals feed their young? Mammals feed their young with milk produced by the mother in special organs called mammary glands.