Biodiversity
Biodiversity: Overview
This Topic covers sub-topics such as Biodiversity, Biodiversity and Conservation, Genetic Diversity, Ecological Diversity, Species Diversity, Loss of Biodiversity, Biodiversity in India, Mass Extinction and, Rivet Popper Hypothesis
Important Questions on Biodiversity
Mention ONE possible reason for loss of biodiversity being higher in the tropics.
Latitudinal gradients have an impact on species diversity. While species diversity is highest at the tropics and lowest at the poles, loss of biodiversity also is highest in the tropics and lowest at the poles. Mention ONE possible reason for the low species diversity at the poles.
Match the animals in column A with their location in column B.
| Column I | Column II | ||
| (i) | Dodo | (a) | Africa |
| (ii) | Qugga | (b) | Russia |
| (iii) | Thylacine | (c) | Mauritius |
| (iv) | Stellar's Sea Cow | (d) | Australia. |
Which of the following is not an invasive alien speices in the Indian context?
Value of Z (regression coefficient) is considered for measuring the species richness of an area. If the value of Z is 0.7 for area A, and 0.15 for area B, which area has higher species richness and a steeper slope?
Could the extinction of Steller’s sea cow and passenger pigeon be saved by man? Give reasons to support your answer.
Introduction of alien species has led to environmental damage and decline of indigenous species. Give any one example of how it has affected the indigenous species?
‘The Evil Quartet’ describes the rates of species extinction due to human activities. Explain how the population of organisms is affected by fragmentation the habitats.
What is meant by stable community?
According to Paul Ehrlich, Loss of rivets on the wings (key species that drive major ecosystem functions) is obviously a more serious threat to flight safety than loss of a few rivets on the seats or windows inside the plane.
Name the following.
The sociobiologist who popularised the term Biodiversity.
Which diversity represents the number of species in a given habitat, whether alpha diversity or beta diversity?
Indian Cheetah is an endangered species.
'Stability of a community depends upon its species diversity" Justify the statement.
Match the word in column I with those of column II
| Column I | Column II |
| (i) 13, 000 genes | (a) Lantana camera |
| (ii) Anticancer drug | (b) Magnolia |
| (iii) Exotic species | (c) Drosophila melanogaster |
| (iv) Primitive genus | (d) Humans |
| (e) Yew tree |
Keystone species deserve protection because these
Which of the following is a key concept in promoting positive health and well-being?
Which of the following is an example of an environmental source of stress?
Which of the following is a psychological source of stress?
Which of the following is an example of a life challenge?
