What other animals develop from fertilized eggs?

What other animals develop from fertilized eggs?

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.

In which of the following animals the embryos develop fully inside the mother’s body?

Explanation: Mammals incubate the embryo inside their body and give birth to the young ones. Birds and Reptiles usually lay eggs as they don’t have mammalian glands and don’t milk their young.

What is Ovoviviparous and example?

Ovoviviparous animals lay eggs and develop the eggs inside the mother’s body. The eggs are hatched inside the mother. Ovoviviparous animals are born live. Some examples of ovoviviparous animals are sharks, rays, snakes, fishes, and insects.

What are the examples of oviparous animals?

Examples: Mostly amphibians, reptiles, birds follow such reproductive strategies. Insects, molluscs, arachnids, and monotremes are examples of oviparous animals. All organisms grow into adults after the young ones are born. This process of growth is subjected to different stages.

What are the two main sources of nourishment for embryos of animals that have internal development?

Fertilized eggs are retained inside the female, and the embryo receives nourishment from the mother’s blood through a placenta. The offspring develops in the female and is born alive. This occurs in most mammals, some cartilaginous fish, and a few reptiles.

What do you believe is the greatest threat to animals and why?

Habitat loss—due to destruction, fragmentation, or degradation of habitat—is the primary threat to the survival of wildlife in the United States. Climate change is quickly becoming the biggest threat to the long-term survival of America’s wildlife.

Which part of the placenta is formed from the embryo?

The placenta begins to develop upon implantation of the blastocyst into the maternal endometrium. The outer layer of the blastocyst becomes the trophoblast, which forms the outer layer of the placenta.

What is unusual about Oviparity in birds?

Oviparity, egg-laying, is considered to be the ancestral mode of reproduction for vertebrates. Conversely, many viviparous species (see below) have very small eggs with little yolk, correlated with their providing other forms of nutrition to the developing young (e.g., via a placenta, etc.). …

What is the difference between Ovoviviparous and viviparous?

Ovoviviparous animals produce eggs and keep them inside the mother’s body until the fetus develops completely and is ready to hatch. On the other hand, viviparous animals directly give birth to young ones. So, this is the key difference between oviparity ovoviviparity and viviparity.

Is Elephant oviparous or viviparous?

Elephants have one of the longest gestation periods of all animals, 22 months. Some viviparous animals such as humans, horses, and cows, give birth to only one offspring at a time, although occasionally these animals produce twins or triplets. Other animals give birth to many offspring at a time.

What are oviparous animals in simple words?

Oviparous animals are female animals that lay their eggs, with little or no other embryonic development within the mother. This is the reproductive method of most fish, amphibians, most reptiles, and all pterosaurs, dinosaurs (including birds), and monotremes.

What is the difference between viviparous and oviparous animal?

The main difference between oviparous and viviparous animals is that oviparous animals do not undergo any embryonic development inside the mother whereas viviparous animals develop into a young animal inside the mother. This means oviparous animals lay eggs. These eggs develop and hatch into young individuals.

Where do mammals carry their young in the uterus?

Mammals that carry their young in the uterus inside a tissue (placenta) that enables nutrients, gases, and wastes to be exchanged between the mother and the embryo. THIS SET IS OFTEN IN FOLDERS WITH…

Where do the embryos develop in an ovoviviparous animal?

Ovoviviparous animals have the embryos develop inside eggs that remain in the mother’s body until they are ready to hatch. The young of some ovoviviparous amphibians, such as Limnonectes larvaepartus, are born as larvae, and undergo further metamorphosis outside the body of the mother.

Are there any organisms that give birth to individuals like humans?

No. All organisms do not give birth to individuals like humans. Question 9. What is the other name of sex cell? Sex cells are also known as gametes. Question 10. What is the organs in humans which produces the gametes?

How are viviparous animals similar to ovovivipitous animals?

Ovoviviparous animals are similar to viviparous species in which there is internal fertilization and the young ones are born alive, but differ in that there is no placental connection and the unborn young ones are nourished by egg yolk; the mother’s body does provide gas exchange (sharks and rays).