Zoology

The Earth can be divided into distinct regions based on the presence or absence of various organisms. These regions are known as realms. Over time, different scientists have proposed various classifications of these realms. In 1857, P. L. Sclater categorized

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Barriers and dispersal are fundamental concepts in zoogeography, the study of the geographical distribution of animals. They influence how species spread, adapt, and evolve in different regions. Barriers in Zoogeography: Barriers restrict or prevent the movement of species, influencing their

Animal distribution refers to how animal species are spread across different geographical regions. The distribution of animals is influenced by factors such as climate, habitat availability, competition, predation, geological changes, and evolutionary history.Animal distribution can be classified into several types

Zoogeography is the branch of biogeography that studies the geographical distribution of animal species across different regions of the world. It helps in understanding how animals are distributed, their evolutionary history, and the factors influencing their dispersal. 1. Descriptive Zoogeography

Zoogeography is the branch of biogeography that studies the distribution of animal species across different geographical regions and the factors influencing their dispersal. It provides insights into how species originated, migrated, and adapted to different environments. Importance of Zoogeography •

The sympathetic nervous system in cockroaches and Gryllus (crickets) belongs to their overall nervous system and is part of the visceral nervous system, responsible for controlling internal organs. Although insects don’t have a “sympathetic nervous system” identical to vertebrates, they