Biochemical Development of Development – Part 3


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Bio-cultural development of development

Examples of divergent evolution

(ii) Australian marsupials develop adaptive radiation or divergence. All marsupials separated from each other evolved from a common ancestral stock, but all within the Australian continent. They evolved and evolved in different forms such as arboreal, aquatic, terrestrial, semicircular and fossil forms.

(iii) Another example of adaptive radiation is based on locomotion in mammals. From the paternal primitive insect that roamed, many forms of animals evolved – animals such as bats, floating animals such as seals, arched hanging animals, a moth-like animal flock, squirrel-like animals, elephant-like animals roaming, fossils Or grazing animals like sesame. , Carnivores such as cheetahs, reindeer such as deer, jumper animals like kangaroos, animals such as flying squirrels. The origin of organs is a common one in these mammals but has been modified differently in different mammals and carries out different functions.

Examples of unsatisfactory delivery

(iii) Elephants – African elephants are different from Asian elephants. Asian elephants are found in areas such as India and African elephants are found in Africa. Both evolved from common elephant ancestors. African elephants are larger in size and have larger ears, while Indian elephants are shorter, with shorter ears.

(iv) Camels – They are found in Asia in areas like India while their closest allies are in South America.

(v) Magnolias, Tulips, and Sassafras – Magnolias is an ornamental flowering shrub or tree with large fragrant flowers. Tulips are hardy, bulbous herbs with ornamental flowers, while sassafras is a fragrant deciduous tree. These flowering plants grow naturally only in the eastern United States and eastern China. When the ice age occurred, only these places were warm and the rest of the area was affected by glaciers. So these pants are here only.

convergent evolution

The development of similar adaptive functional structures in unrelated groups of organisms is called convergent evolution.

Examples given:

(1) Insects, birds and bat wings. The insect is an invertebrate, while both birds and bats are vertebrates that belong to the avs and class animals, respectively. Feathers in all three are uniquely related animal forms used to fly in the air. However, they differ greatly in basic structure and origin. Each has evolved differently from a different ancestral population, but as a more efficient means of movement.

(2) Spiny antique and scali antic belong to a different order of class mamelia. They have achieved similar adaptation to food (examples are ants, termites and other insects).

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