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Only mammals have mammary glands. These are the means by which the female nurtures her young on mothers' milk.

Mammals are also the only vertebrates with fur or hair.

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13y ago

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Birds are the only thing that has?

Birds are the only things that have feathers and hollow bones.


Which birds does not lay egg?

Male birds do not lay eggs. Only female birds have the ability to lay eggs.


What are the only mammals with wings?

No, insects and bats have wings and neither of them are birds.


What is the one adaptation all birds have that no other animal has?

Feathers are the only adaptation that all birds have. Birds have wings. They are the only vertebrates that do have wings, even though in some birds they are non-functional. However, they are not the only living creatures to have wings, as many insects do as well. Thee are some adaptations that are not found in all species of birds, but which are unique to birds. Flighted birds have light weight hollow bones developed for flight, but this is not found in all birds. Some birds have complex adaptation of the larynx which allows high speed complex bird calls to be created, but again, this is not found in all birds.


Your friends went to the beach at noon They saw black and white birds write 3 observations and 3 inferences?

Three observations include:Birds exist, as do the beach and the time of noonBlack birds existWhite birds existBlack birds can be seen at noonWhite birds can be seen at noonBlack birds can be seen on the beachWhite birds can be seen on the beachBlack and white birds can be seen at the same timeInferences can include:There are only black birds and white birdsBirds can only be seen at the beachBirds can only be seen at noonBlack birds cannot be seen without white birds, and vice versaAny black or white creature on the beach at noon is a bird