mammary glands
BackboneHairYoung aliveNurse the young
In the genetic sense, it can't. Evolution really has one direction, and one direction only: forward. However, evolution may cause organisms to evolve traits that resemble traits of some of their precursors. For instance, whales are sea-mammals that descended from land-mammals, which in turn evolved from earlier aquatic organisms like fish. But due to the demands of their environment, whales evolved an overall morphology that resembles those of these earlier fish.
A homologous structure that is shared by all organisms in a group is a characteristic that has evolved from a common ancestor. For example, the forelimbs of mammals, birds, reptiles, and amphibians exhibit similar bone structures despite serving different functions, indicating their evolutionary relationship. These shared anatomical features provide evidence for common ancestry and help classify organisms within the same evolutionary lineage.
Yes, mammals are organisms. Mammals are a diverse group of warm-blooded vertebrates that have hair or fur, give birth to live young (as opposed to laying eggs), and typically nurse their young with milk. They are found in various habitats around the world and play vital roles in ecosystems.
Look to the morphologies of all mammals and see rather easily how closely related they are in comparison to the more distantly related morphologies of all reptiles. Ancestral traits, such as tetropodal arrangement of limbs and then derived differences between mammals and reptiles. Reptiles having scales and mammals having hair.
Mammalae, or breasts.
These features were used to classify organisms before the development of DNA analysis. This way, scientists were able to look at certain morphological traits to classify the organism and then correlate them to their closest relatives. For example. Although bats are a lot like birds, certain morphological traits allow them to be classified as something other than birds. i.e. they are mammals - they have similar bone structure to most mammals In this regard, it is based traits other than their wings that they are classified as mammals, and not birds. Hope this helps
Aristotle made a classification of living things. There were probably others earlier than him, but his is fairly sophisticated. He classified whales as mammals, for example.
YES
mammals
BackboneHairYoung aliveNurse the young
It depends on what you mean by non-mammals. If you are counting all matter as a non-mammal, then most non-mammals are not organisms. If you are counting a non-mammal as any life form or any animal that is not a mammal, then all non-mammals are organisms.
mammals
mammals
Deer are mammals.
In the genetic sense, it can't. Evolution really has one direction, and one direction only: forward. However, evolution may cause organisms to evolve traits that resemble traits of some of their precursors. For instance, whales are sea-mammals that descended from land-mammals, which in turn evolved from earlier aquatic organisms like fish. But due to the demands of their environment, whales evolved an overall morphology that resembles those of these earlier fish.
organisms * fish * mammals * grasses