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Consider the following pairs: Type of Diversity Example 1. Genetic diversity: Mangroves Forests and Rain Forests 2. Species diversity: Greater amphibian species in the Western Ghats than the Eastern Ghats 3. Ecosystem diversity: Different varieties of Mango found in India Which of the pairs given above is/are correctly matched?
Consider the following statements regarding the methods of measuring Biodiversity: 1. Alpha diversity indicates the diversity between the communities. 2. Beta diversity indicates the diversity within the community. 3. Gamma diversity refers to the diversity of the habitats over the total landscape. Which of the statements given above is/are correct?
Consider the following statements with respect to diversity :- (A) Diversity is a source of strength for India. (B) There is unity in India's diversity. (C) Diversity can also be a source of discrimination. (D) Historical and geographical factors contribute to diversity. Which of the above are true?
Why do exotic species pose a threat to an indigenous ecosystem such as in a Lake or an isolated island in the Andamans? 1. Such species compete with the local or native species for food. 2. They may be predators of local species. 3. Such species may cause diseases in native species. Select the correct answer code:
An ecosystem is joined by thousands of species, if a problem occurs causing a species to become extinct, it may not affect the proper functioning of the ecosystem initially, but as more and more species are removed, the ecosystem becomes dangerously weak over a period of time. Which hypothesis gave this sentence?
Which of the following statements are true about ecosystem? Select the correct answer from the codes: 1. Ecosystem comprises both biotic and abiotic components. 2. Solar energy is the main driving force of the ecosystem. 3. Ecosystem is a closed system. 4. Ecosystem does not have its own productivity.
Consider the following statements and choose the correct answer:
1. The ecosystem is a major ecological unit
2. The function of ecosystem is related to the flow of energy and the cycling of materials through the structural components of the ecosystem
3. The major functional unit of the ecosystem is the population
4. The ecosystem has historical aspects: the present is related to the past, and the future is related to the present
In the following question, sentences of a paragraph have been jumbled and labelled as A, B, C and D. You are required to rearrange the jumbled sentences of the paragraph and mark your response accordingly by selecting the correct option. A: Many nations have laws that protect conservation-reliant species which, for example, forbid hunting, restrict land development, or create protected areas. B: The International Union for Conservation of Nature (IUCN) Red List lists the global conservation status of many species, and various other agencies assess the status of species within particular areas.  C: Endangered species may be at risk due to factors such as habitat loss, poaching, and invasive species. D: An endangered species is a species that is very likely to become extinct in the near future, either worldwide or in a particular political jurisdiction.
Besides species diversity and ecosystem diversity, which of the following is included in the term 'bio-diversity'?
Read the following passage and answer the item that follows. Your answers to this item should be based on the passage only. Many farmers use synthetic pesticides to kill infesting insects. The consumption of pesticides in some of the developed countries is touching 3000 grams/hectare. Unfortunately, there are reports that these compounds possess inherent toxicities that endanger the health of the farm operators, consumers and the environment. Synthetic pesticides are generally persistent in environment. Entering in food chain they destroy the microbial diversity and cause ecological imbalance. Their indiscriminate use has resulted in development of resistance among insects to insecticides, upsetting of balance in nature and resources of treated populations. Natural pest control using the botanical pesticides is safer to the user and the environment because they break down into harmless compounds within hours or days in the presence of sunlight. Plants with pesticidal properties have been in nature for millions of years without any ill or adverse effects on the ecosystem. They are easily decomposed by many microbes common in most soils. They help in the maintenance of biological diversity of predators and human health hazards. Botanical pesticides formulated from plants are biodegradable and their use in crop protection is a practical sustainable alternative. Which of the following statements is/are correct regarding biopesticides? 1. They are not hazardous to human health. 2. They are persistent in environment. 3. They are essential to maintain the biodiversity of any ecosystem. Select the correct answer using the code given below.