Tag: biology

Quizzes (1160) Questions (12174)

Questions Related to biology

Multiple choice biology air and water pollution control environmental impact: global warming green house effect geobiochemical cycle

Few pollutants and their effects are listed below.
Mark the incorrect match.

  1. Phosphate fertilizers in water - Eutrophication

  2. Hydrogen released in air - Global warming

  3. Sewage disposed in water - Increase in BOD level

  4. Carbon dioxide in air - Acid rain
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Global warming occurs when gases like carbon dioxide and other greenhouse gases in the atmosphere absorb sunlight and solar radiation. They trap the heat and increase the temperature on the earth's surface. 

Multiple choice biology air and water pollution control environmental impact: global warming green house effect geobiochemical cycle

The main reasons for deforestation are:

  1. rapid increase in the population of human beings and their livestock

  2. urbanization and human settlements

  3. cutting down of trees for obtaining fuel

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The main reasons for deforestation are-rapid increase in the population of human beings and their livestock, urbanization and human settlements, cutting down of trees for obtaining fuel.

Multiple choice biology air and water pollution control environmental impact: global warming green house effect geobiochemical cycle

The radiations from the sun is trapped by the earth's atmosphere. This effect is called :

  1. green house effect

  2. nursery effect

  3. trapping effect

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The greenhouse effect is the process by which radiation from the sun is trapped by greenhouse gases in the Earth's atmosphere, warming the planet.

Multiple choice biology air and water pollution control environmental impact: global warming green house effect geobiochemical cycle

When the soil of the greenhouse nurseries is sterilized with methyl bromide gas, it leads to a deficiency of:

  1. cellulose in roots

  2. chlorophyll in green leaves

  3. zinc in plants

  4. iron in red flowers
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Greenhouse nursery is a plant nursery where the plants are kept protected by several types of rodent and pest control product. Use of $MeBr$ gas leads to a deficiency of $Zn$ in plants as methyl bromide is very toxic.

Multiple choice biology air and water pollution control environmental impact: global warming green house effect geobiochemical cycle

Green house effect is mainly due to increase in the levels of:

  1. $O _{2}$
  2. $CO$
  3. $CO _{2}$
  4. $N _{2}$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A layer of carbon dioxide present in the atmosphere prevents the infrared radiations (reflected by the Earth's surface) from going out in the atmosphere. This heats up the Earth's surface and results in green house effect.