Tag: biology

Questions Related to biology

IUCN (International Union for Conservation of Nature and Natural Resources) which maintains red data book has its head quarters at 

biology main natural resources classification of threatened species red data book methods of conservation

  1. Kew, London

  2. Calcutta, India

  3. Morges, Switzerland

  4. New York, USA

Show answer
Correct Option: C
Explanation:

'The International Union for Conservation of Nature' (IUCN) is an international organization which is working in the field of nature conservation and sustainable use of natural resources. 

It is involved in data gathering and analysis, research, field projects, advocacy, lobbying and education. 
IUCN has a membership of over 1200 governmental and non-governmental organizations. 
Some 11,000 scientists and experts participate in the work of IUCN commissions on a voluntary basis. It employs approximately 1000 full-time staff in more than 60 countries. Its headquarters is in Switzerland. 

According to IUCN red List, what is the status of red panda (Ailurus fulgens)?

biology main natural resources classification of threatened species red data book methods of conservation

  1. Vulnerable species

  2. Critically endangered species

  3. Extinct species

  4. Endangered species

Show answer
Correct Option: D
Explanation:

Endangered species are those species which are on verge of becoming extinct. According to IUCN Red List, the red panda (Ailurus fulgens) comes under the list of endangered species. Due to deforestation, poaching, red pandas are at very high risk of being extinct. Its population has declined below 50% in last three generation.

Thus, the correct answer is option D.

If a certain plant species is not found in its wild localities even after repeated search, then it would be listed in which category in the "Red Data Book"?

biology main natural resources classification of threatened species red data book methods of conservation

  1. Extinct

  2. Endangered

  3. Vulnerable

  4. Rare

Show answer
Correct Option: A
Explanation:

There are nine categories present in the 'IUCN Red List' system: extinct, extinct in the wild, critically endangered, endangered, vulnerable, near threatened, least concern, data deficient and not evaluated. 

Classification into these categories occurs through a set of quantitative criteria that are based on biological factors that include the rate of decline, population size, the area of geographic distribution, and degree of population and distribution fragmentation. 
A species is listed as extinct in the wild when it is known only to survive in cultivation, captivity or as a naturalized population outside the previous range. A species is presumed extinct in the wild when exhaustive surveys in known and/or expected habitat, at appropriate times (diurnal, seasonal, annual), throughout its historic range have failed to record an individual.

Red data book is famous for 

biology main natural resources classification of threatened species red data book methods of conservation

  1. Extinct plants and animals

  2. Extinct plants only

  3. Endangered plants and animals

  4. Extinct animals only

Show answer
Correct Option: C
Explanation:

The 'Red Data Book' is the state document which is established for documenting rare and endangered species of animals, plants and fungi as well as some local subspecies, that exist within the territory of the state or country. This book provides essential information for studies and monitoring programmes on rare and endangered species and their habits. 

The organisation which has published Red Data Book is

biology main natural resources classification of threatened species red data book methods of conservation

  1. International Union for Conservation of Nature and Natural Resource

  2. National Environmental Engineering Research Institute

  3. National Wildlife Action Plan

  4. Convention on International trade in Endangered species of Wild fauna and flora

Show answer
Correct Option: A
Explanation:

The IUCN Red List of threatened species was founded in 1964. It is the world's most comprehensive inventory of the global conservation status of biological species. The International Union for the Conservation of Nature (IUCN) is the world's main authority on the conservation status of species. 

Therefore, the correct answer is option A.

Read the given statements with one or two blanks and select the option which correctly fill the blanks of any two statements.
(a) .................. is being maintained by .............. which is now known as World Conservation Union.
(b) ................. is specified land area in which multiple use of land is permitted for preserving biodiversity.
(c) .............. are species which are likely to move to ................. category in near future, if causative factors continue to operate.
(d) ............. are those specific regions of mega-biodiversity nations which have large numbers of .................. species.

biology main natural resources classification of threatened species red data book methods of conservation

  1. a - Red Data Book, IUCN, c - Vulnerable, endangered

  2. c- Endangered, rare, d - Hot spots, extinct

  3. b - Biosphere reserve, d - National park, exotic

  4. a - Red Data Book, WWF, b - Wild life sanctuary

Show answer
Correct Option: A
Explanation:

Red Data Book is being maintained by IUCN which is now known as the World Conservation Union. Vulnerable are species which are likely to move to the endangered category in near future if causative factors continue to operate. A biosphere reserve is a specified land area in which multiple uses of land is permitted for preserving biodiversity. Hot spots are areas with high density of biodiversity or mega diversity.

Which one of the following expanded forms of the following acronyms is correct?

biology main natural resources classification of threatened species red data book methods of conservation

  1. IPCC- International Panel for Climate Change

  2. UNEP- United Nations Environmental Policy

  3. EPA- Environmental Pollution Agency

  4. IUCN- International Union for Conservation of Nature and Natural Resources

Show answer
Correct Option: D
Explanation:

The Intergovernmental Panel on Climate Change - (IPCC) 

The United Nations Environment Programme - UNEP
Environmental Protection Agency - EPA
International Union for Conservation of Nature and Natural Resources - IUCN
Therefore, the correct answer is option D.

Most effective wavelength of light for photosynthesis is

development of plants plant growth growth and development plant growth and development biology

  1. Green

  2. Violet

  3. Red

  4. Yellow

Show answer
Correct Option: C
Explanation:

Light is an essential factor for photosynthesis. There is a linear relationship between incident light and $CO _{2}$ fixation at low light intensities. At higher light intensities, gradually the rate does not show further increase as other factors become limiting. Light between 400-700 nm wavelength constitute the photosynthetically active radiation (PAR). Maximum photosynthesis takes place in red and blue light of the visible spectrum and minimum photosynthesis takes place in the green light. The most effective wavelength of light for photosynthesis is red because maximum absorption by chlorophyll a takes place in the red light.

Growth of a shoot or a root involves

development of plants plant growth growth and development plant growth and development biology

  1. Cell enlargement

  2. Cell division

  3. Cell differentiation

  4. All the above

Show answer
Correct Option: D
Explanation:

Growth is an irreversible increase in the size. There are three developmental stages of growth of all plant parts including shoot and root. These are cell division, cell enlargement and cell differentiation. Cell division is the first phase that results in increase in the number of cells. In plants, karyokinesis, division of nucleus is followed by cytokinesis, the division of the cytoplasm. Cell enlargement gives the proper size to the organ and tissue. During this, protoplasm, vacuole, etc are formed. Cell differentiation is seen at cell level, tissue level, organ level and at the level of an organism. The cells differentiate to form different types of tissues that later perform different but specific functions.

Thus, the correct answer is option D.

Which of the following makes water a very essential element for growth of plant?

development of plants plant growth growth and development plant growth and development biology

  1. Turgidity of cells helps in extension growth

  2. Water provides the medium for enzymatic activities

  3. Cell enlargement

  4. All of the above

Show answer
Correct Option: D
Explanation:

Water is essential in the following ways:-

  1. It carries nutrient to the entire plant.
  2. It maintains the turgidity of the cell.
  3. It maintains the shape of the cell.
  4. About 90% of the plant body is made up of water.
  5. It provides proton in photosynthesis and provides oxygen for respiration.
So the correct option is 'All of the above'.