Why a camel, a cactus and a seal look so different. The main abiotic factors, the four ways in which an organism meets a hard season, and the adaptations that help it to survive and to breed.
3 lessons, about 1 h 25 min3 simulations11 problems3 practice questionsPython in every lesson
Created by StemPy LabAn organism lives in a place with its own temperature, water, light and soil. These abiotic factors decide which organisms can live there. This lesson names the four levels of ecology, gives the numbers that NCERT states for temperature and salinity, and explains the words eurythermal, stenothermal, euryhaline and stenohaline.
A cold night, a dry season or a salty lake is a stress. An organism can regulate its inside, conform to the outside, migrate to a better place or suspend its activity. This lesson explains the four responses with the standard examples, and why very small animals rarely live in the polar regions.
An adaptation is a feature of an organism, in its body, its working or its behaviour, that helps it to survive and to breed in its habitat. This lesson gives the standard examples from deserts, cold regions and high mountains. It explains Allen's rule with the surface of a body, and it separates an adaptation from the acclimatisation of one person.
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