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NEET UG Biodiversity and Conservation — practice questions — page 3

Explore 161 free Biodiversity and Conservation questions in NEET UG Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Biodiversity and Conservation questions and exercises with answers

Showing questions 61–90 of 161.

Excess nutrients turn a pond green with free-floating algae. This is an:Read the answer and worked solution →The water hyacinth, a lovely-flowered weed choking Indian waterways, is called the:Read the answer and worked solution →DDT at 0.003 ppb in water reaches 25 ppm in fish-eating birds. This rise up the food chain is:Read the answer and worked solution →High DDT in birds disturbs calcium metabolism and causes:Read the answer and worked solution →The natural aging of a lake by nutrient enrichment is called:Read the answer and worked solution →Open garbage dumps breed rats and flies. They were replaced by:Read the answer and worked solution →A greenhouse warms up because its glass lets light in but:Read the answer and worked solution →The two gases named as the main greenhouse gases are carbon dioxide and:Read the answer and worked solution →Good ozone that shields us from UV lies in the:Read the answer and worked solution →The refrigerant chemicals that destroy stratospheric ozone are:Read the answer and worked solution →A single Cl atom keeps destroying ozone because it acts as a:Read the answer and worked solution →The ozone hole appears each year above:Read the answer and worked solution →The 1987 treaty to control ozone-depleting substances is the:Read the answer and worked solution →The National Forest Policy of 1988 recommends what forest cover for the plains?Read the answer and worked solution →In 1974 women of the Garhwal Himalayas hugged trees to stop contractors. This was the:Read the answer and worked solution →Catch the warming fixesRead the answer and worked solution →Pop the sewage diseasesRead the answer and worked solution →Steer into the eco laneRead the answer and worked solution →Slice the pollution wordsRead the answer and worked solution →Air or waterRead the answer and worked solution →Which issue is itRead the answer and worked solution →Type the yearRead the answer and worked solution →Environment bingoRead the answer and worked solution →Which sociobiologist popularised the term biodiversity?Read the answer and worked solution →Rauwolfia strains differ in the potency of which active chemical?Read the answer and worked solution →India has more than how many genetically different strains of rice?Read the answer and worked solution →Western Ghats outnumber Eastern Ghats in amphibian species. This showsRead the answer and worked solution →Per IUCN (2004), how many plant and animal species had been described in total?Read the answer and worked solution →Animals make up roughly what share of all recorded species?Read the answer and worked solution →Plants, including algae and fungi, form no more than what share of recorded species?Read the answer and worked solution →

Worked practice questions

Excess nutrients turn a pond green with free-floating algae. This is an:

  1. Ozone hole
  2. Algal bloom
  3. Oil spill
  4. Acid rain
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Correct answer: B. Algal bloom

1. Nutrients feed planktonic algae. 2. They multiply and colour the water. 3. This is an algal bloom. _Source: syllabus Biology, Chapter 16, Environmental Issues._

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The water hyacinth, a lovely-flowered weed choking Indian waterways, is called the:

  1. Rose of India
  2. Weed of Kerala
  3. Terror of Bengal
  4. Pride of Bengal
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Correct answer: C. Terror of Bengal

1. It was brought in for its mauve flowers. 2. It now blocks waterways faster than it can be removed. 3. Its nickname is the Terror of Bengal. _Source: syllabus Biology, Chapter 16, Environmental Issues._

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DDT at 0.003 ppb in water reaches 25 ppm in fish-eating birds. This rise up the food chain is:

  1. Eutrophication
  2. Photosynthesis
  3. Decomposition
  4. Biomagnification
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Correct answer: D. Biomagnification

1. DDT cannot be broken down or excreted. 2. It passes on and concentrates at each trophic level. 3. That is biomagnification. _Source: syllabus Biology, Chapter 16, Environmental Issues._

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More Biology topics

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