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An assertion and a reason are given below. Assertion: The phenomenon of nuclear fission generates great energy. Reason: The process in which a nucleus is broken into two parts is called nuclear fission. Choose the answer. A. Both Assertion and Reason are true and Reason is the correct explanation of Assertion. B. Both Assertion and Reason are true but Reason is not the correct explanation of Assertion. C. Both Assertion and Reason are false. D. Assertion is true but Reason is false.
Deforestation results in :
1. flora destruction
2. fauna destruction
3. ecological disbalance
Consider the given statement and decide which of the following assumptions is/are implicit in the statement Statement: “Every city must house an ecological park”, says the Mayor to his secretary. Assumptions: I. Ecological parks improve green cover. II. Ecological parks help reduce air pollution.
Read the list of Ecological concerns and the year in which Acts were executed in India : Ecological concerns Year, Act was passed (A) Wildlife Protection (i) 1986 (B) Environment Protection  (ii) 2013 (C) The Scheduled Tribes and other Traditional forest dweller's (Recognition of Forest Rights) (iii) 1972 (D) The Forest Conservation Policy (iv) 1988 Which one of the following is the correct matching?
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. On the basis of the above passage, the following assumptions have been made: 1. Synthetic pesticides should never be used in modern agriculture. 2. One of the aims of sustainable agriculture is to ensure minimal ecological imbalance. 3. Botanical pesticides are more effective as compared to synthetic pesticides. Which of the assumptions given above is/are correct?
With reference to ecological niche, which of the following statements is/are correct? 1. It represents the range of conditions that it can tolerate the resources it utilizes and its functional role in the ecological system. 2. Each species has a distinct niche. Select the correct answer from the code given below:
Trophic structure may be shown graphically by ecological pyramids; which of the following ecological pyramid will always have a true upright shape
Ecological pyramid shows the number energy or biomass at each trophic level. Generally ecological pyramids are upright. However, one of the following pyramid is 'inverted'. Identify.
What is the main reason for the reduction of ecological services?
The following items consist of two statements, one labeled as “Assertion (A)” and the other labeled as the “Reason (R)”. You are to examine the two statements carefully and decide if the Assertion (A) and the Reason (R) are individually true and if so whether the reason is a correct explanation of the assertion. Select your answer to these items using the codes given below and mark your answer accordingly. Assertion (A): There are many applications in which digital outputs are required to be generated in accordance with the sequence in which input signals are received. Reason (R): These belong to such applications which only depends on the present input state.