Is it true that young cetaceans are not precocial?

1. What kind of birds are precocial?
2. What animals are helpless at birth?
3. Do humans have precocial young?
4. Are birds precocial?
5. Are deer precocial?
6. Why are human babies born so helpless?
7. Can babies survive on their own?
8. Why do humans give birth to single baby at a time?
9. What is the opposite of altricial?
10. What is a disadvantage of precocial young?
11. Which animal Cannot walk?

What kind of birds are precocial?

Precocial birds find their own food, sometimes with help or instruction from the parents. Examples of precocial birds include the domestic chicken, many species of ducks and geese, waders, rails, and the hoatzin.

What animals are helpless at birth?

Altricial young are born helpless and require care for a length of time. Altricial birds include herons, hawks, woodpeckers, owls, cuckoos and most passerines. Among mammals, marsupials and most rodents are altricial.

Do humans have precocial young?

Humans differ from other primates in terms of neonatal development. Our neonates are born with the least-developed brains of any primate, with brains less than 30% of adult size (4). As a result, although human newborns are precocial in other respects, our neonates are neurologically and behaviorally altricial.

Are birds precocial?

Precocial birds are well developed when they hatch and quickly able to stand and walk on their own (see Figure 1). Most domestic poultry species—chickens, ducks, turkeys, and so on—are precocial. The exception is pigeons.

Are deer precocial?

Animals that can are called precocial. ... Examples of species with precocial babies are ducks, horses, and deer. Altricial animals, however, are born with little to no hair or feathers, with eyes and ears closed, and must receive weeks or even months of care from their parents before they are able to survive on their own.

Why are human babies born so helpless?

Although newborns of other primate species rely on caregivers, too, human infants are especially helpless because their brains are comparatively underdeveloped. ... Human babies are thus born when their brains are less than 30 percent of adult brain size so that they can fit through the narrow passageway.

Can babies survive on their own?

In general, infants that are born very early are not considered to be viable until after 24 weeks gestation. This means that if you give birth to an infant before they are 24 weeks old, their chance of surviving is usually less than 50 percent. Some infants are born before 24 weeks gestation and do survive.

Why do humans give birth to single baby at a time?

As such, evolution dictated that survival is maximized for our species when there is only one baby at a time, as the overworked parents can give more required nurturing to one child at a time than five or six, and as such, that child is more likely to survive.

What is the opposite of altricial?

Precocial – young that are born or hatched with some downy feathers and are mobile and able to flee or defend themselves from predators; opposite of altricial, describing young that need time to mature before leaving the nest.

What is a disadvantage of precocial young?

Hatch with eyes closed. Little or no down* Cannot leave the nest. Fed by parents. Cannot maintain their own body temperature.

Which animal Cannot walk?

Kangaroos are well known as large, hopping mammals from Australia that carry their offspring in pouches. What may not be so well known, though, is that kangaroos cannot walk backwards.