Sources of Variation in Life
Sources of Variation in Life: Overview
This topic covers concepts such as Biodiversity, Heredity and Variation, Geological Time Scale, and Environmental Variation.
Important Questions on Sources of Variation in Life
Why is variation beneficial to the species but not necessarily for the individual?
Can the hereditary disease be cured?
Changes like mutation, random mating, genetic drift, etc., can cause environmental variations.
Write any two differences between environmental and genetic variation.
How many biodiversity hotspots are there in the world?
The transmission of characters from parents to offspring is called
Environmental variations can cause a change in the phenotype of an organism.
Describe the term variations.
Ramagundam: Peddapalli District, 60-70 years back Ramagundam had dense forest with a rich heritage of wildlife. This forest extended to border areas of Mancheryal. It was an abode for wild animals like tigers, leopard, deers, hyenas (kondrigallu), foxes, wild boars (adavi pandhi), bears, pythons, cobras, porcupines (mulla pandhi), owls, hares, monitor lizards (udumu) scorpions, geremandals (like the desert spider), etc. After the erection of the thermal power station at Ramagundam (using coal to produce power) and other industries, human activities increased. Then many buildings, roads and stone quarries have come into existence. The Forest area was cleared and so several organisms started disappearing. Though an area near Mancherial (very close to Ramagundam) was once known as Tiger valley, shows no signs of tigers now. Animals like, foxen, deers and geremandals (resembles desert spider) are also not seen these days. We rarely see animals like pythons, cobras, deers some kinds of scorpions and Bears in the forest. Now there are several human settlements in the area. Some areas of less dense forests with animals like pythons, cobras, deers, scorpions, etc. are commonly seen. Bears are rarely found. Peacocks have been sighted recently.
The above case study explains you the need for conservation of biodiversity.
Do we find tigers anywhere else in our country?
It is necessary to conserve biodiversity.
Members of a species have
Which one of the following is not included under in-situ conservation?
Variety of organisms existing on the earth, their interrelationships and their relationship with the environment is called
A group of population which is capable of inter breeding is known as
Ex situ conservation is carried out in
