What is the altricial development?

Definition. An immature state of development following birth or hatching that necessitates care by others.

What is precocial and altricial?

A precocial bird is “capable of moving around on its own soon after hatching.” The word comes from the same Latin root as “precocious.” Altricial means “incapable of moving around on its own soon after hatchling.” It comes from a Latin root meaning “to nourish” a reference to the need for extensive parental care …

What are the examples of oviparity?

Examples of oviparous animals include frogs, snakes, lizards, hens, duck, fishes, shark, penguins, butterflies, octopus, etc. Examples of viviparous animals include humans, bears, giraffes, cattle, some sharks, salamanders, some frogs, etc.

What is the meaning of altricial?

Definition of altricial : being hatched or born or having young that are hatched or born in a very immature and helpless condition so as to require care for some time altricial birds — compare precocial.

What are altricial organisms?

Altricial animals are those species whose newly hatched or born young are relatively immobile. They lack hair or down, are not able to obtain food on their own, and must be cared for by adults; closed eyes are common, though not ubiquitous.

What is difference between oviparity and ovoviviparity?

The key difference between oviparity, ovoviviparity and viviparity is that oviparity is the trait of laying eggs, while ovoviviparity is the development of embryos inside eggs that are retained within the mother’s body until they are ready to hatch, and viviparity is giving birth to young ones directly.

What is the meaning of oviparity?

Here, oviparity is defined as the oviposition of an embryo within a shelled egg requiring some period of embryonic development outside of the female’s reproductive tract (Guillette, 1993).

Are humans altricial or precocial?

We are secondarily altricial. Our reproductive strategy looks like that of a precocial species – one progeny at a time and a substantial resource investment in each – but our infants resemble altricial infants much more than precocial ones.

Are humans altricial?

Evolution of the Human Brain: From Matter to Mind Human babies are born altricial and continue to experience fetal rates of brain growth for their first year of life, necessitating increased parental care.

Are dogs altricial?

Dogs are altricial species that depend entirely on the dam to survive, obtaining warm, food, movement, protection from predators and stimulation through anogenital licking to eliminate waste.

What is the difference between oviparity and?

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.