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The independent development of similar characters in two animal groups of common ancestry living in similar habitats of different habitats is called parallel development.
It is seen in many placental and marsupial mammals. Among the placental mammals there are parallels in development by wolf, bobcat, antique, flying squirrel, groundhog, mole, lemur, and house mouse, marsupials, Tasmanian wolf, Tasmanian tiger cat, sunnah (anticutter), flying felanger, wombat, marsupala. , Macular cuscus and marsupial mouse, respectively.
The placental wolf and the Tasmanian wolf, for example, are closely related forms in similar habitats but in different continents. The placental wolf is found in Asia while the Tasmanian wolf is found in Australia. These animals have a common ancestry. They revealed independent development of similar structures in two animal groups of common ancestry in their habitats (different continents). The placental wolf, and the Tasmanian wolf, therefore reveal parallel development.
In the evolutionary view, modern species occur in places where they evolved from ancestors who inhabited those areas. It is not that the species was individually kept in a suitable environment by the manufacturer.
Sources of physiological or bio-development
Comparative biochemistry indicates a relationship between animals. There are various aspects of biochemistry
1.Metabolic processes Such as digestion, biosynthesis, respiration, muscle contraction and transmission of nerve impulses occur equally in almost all animals. The types of chemical reactions and substances involved are the same in all animals.
2. Enzymes Most animals are essentially identical in their nature and action. For example, trypsin, which digests proteins, is found in many animals from sponges to males.
3. Hormones Their chemical is found in nature and serves all vertebrates. The similarity is so close that human insulin deficiency can be given to the pancreas of other animals. Thyroxine plays a role in the metamorphosis of a tadpole into a frog. If the thyroid gland is further removed, the tadpole turns into a frog. Such a larva begins metamorphosis if it feeds on the thyroid glands of other animals.
4. Blood and lymph fluid All compositions are similar in their structure and physical role.
5.Blood group – Humans have four blood groups: A, AB, B and O. Blood groups A and B in humans are also found in apes, not monkeys. Therefore humans are closely related to monkeys, even though all three have a common ancestry.
6. The similarity between animals at the molecular level is called Molecular homology
There is many biographical and physiological evidence of development between animals and plants.