What animals have internal development?

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.

1. What is internal development in animals?
2. What are animals that develop inside the body?
3. What animals practice internal fertilization?
4. Do reptiles have internal development?
5. Is fish internal or external fertilization?
6. Do mammals have internal or external development?
7. What are the stages of animal embryonic development?
8. Do snakes have internal or external fertilization?
9. Do lizards have internal or external fertilization?
10. Do frogs have internal or external fertilization?
11. Do Sharks practice internal fertilization?
12. Do chickens have internal or external fertilization?
13. Are fish asexual?
14. What animals fertilize externally?
15. Do goldfish have genders?

What is internal development in animals?

Internal development is when the embryos develop inside one of its parents. ( This is generally the female). A good example of this is a cat or a dog. The kittens and puppies develop inside the mother until they are mature enough to survive in the open air.

What are animals that develop inside the body?

A viviparous animal is an animal that develops an embryo inside the body of the female, resulting in the live birth of a young one. Oviparous animals lay eggs that later hatch to form young ones. Viviparous animals give direct birth to young ones.

What animals practice internal fertilization?

Salamanders, spiders, some insects and some molluscs undertake internal fertilization by transferring a spermatophore, a bundle of sperm, from the male to the female.

Do reptiles have internal development?

Most reptiles reproduce sexually and have internal fertilization. Reptile eggs are amniotic, so they can be laid on land instead of in water. Reptiles do not have a larval stage, and their hatchlings are relatively mature.

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.

Do mammals have internal or external development?

In mammals fertilization takes place INSIDE the mother's body, and development occurs INSIDE the uterus.

What are the stages of animal embryonic development?

Animal embryos

The development of a zygote into a multicellular embryo proceeds through a series of recognizable stages, often divided into cleavage, blastula, gastrulation, and organogenesis. Cleavage is the period of rapid mitotic cell divisions that occur after fertilization.

Do snakes have internal or external fertilization?

Snakes reproduce by internal fertilization and either give birth to live young or lay eggs, depending on the species. Female live-bearing snakes will find a sheltered location to give birth before abandoning the young to fend for themselves.

Do lizards 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 frogs have 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.

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 chickens have internal or external fertilization?

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

Are fish asexual?

The fish reproduces using a strategy in which a female's egg cell develops into a baby without being fertilized by a male's sperm cell. But that does not mean the fish does not need some hanky panky. ... About 50 vertebrates are known to use asexual reproduction including fish, amphibians and reptiles.

What animals fertilize externally?

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.

Do goldfish have genders?

Male goldfish and female goldfish have visible differences in their pectoral, or front, fins. These differences can be difficult to spot if you have particularly active goldfish. Males have longer, narrower fins than females, while female goldfish tend to have thicker, shorter fins.