Biodiversity and Conservation PYQ's

By -

Visit You tube channel for more MCQ's: https://www.youtube.com/channel/UCDI5O7VNvIby-Faq_ptLefw

Previous Year Questions:

1. List of endangered species was released by-                                                                             (2024)

1) GEAC
2) WWF
3) FOAM
4) IUCN

Ans. 4 - IUCN

2. These are regarded as major cause of biodiversity loss:                                                         (2024)

A. Over exploitation
B. Co-extinction
C. Mutation
D. Habitat loss and fragmentation
E. Co-extinctions

Choose the correct option:

1) A,C and D only          2) A,B,C and D only
3) A,B and E only          4) A,B and D only

Ans. 4 - A,B and D only.

Explanation: Causes of biodiversity loss are 1) Habitat loss and fragmentation. 2) Over-exploitation
3) Alien species invasion 4) Co-extinctions

3. Tropical regions show greatest level of species richness because                                             (2024)

A. Tropical latitudes have remained relatively undisturbed for million of years, hence more time         was available for species diversification.
B. Tropical environments are more seasonal.
C. More solar energy is available in tropics.
D. Constant environment promote niche specialization.
E. Tropical environments are constant and predictable.

Choose the correct answer from the options given below.

1) A, C, D and E only
2) A and B only
3) A, B and E only
4) A, B and D only

Ans. 1 - A, C, D and E only

Explanation: Statement B is incorrect because tropical environments unlike temperate ones are less seasonal. Statement A, C, D and E are correct.

4. The type of conservation in which the threatened species are taken out from their natural habitat and placed in special setting where they can be protected and given special care is called:
(2024)

1) in-situ conservation.
2) Biodiversity conservation.
3) Semi-conservative method.
4) Sustainable development.

Ans. 2 - Biodiversity conservation

Explanation: The type of conservation in which the threatened species are taken out from their natural habitat and placed in special setting where they can be protected and given special care is called Ex-situ conservation. Ex-situ conservation is a type of biodiversity conservation and hence 2nd option is correct.

5. Match List I with List II:                                                                                                         (2024)

List I

List II

A) Robert May

  I. Species are relationship

B) Alexander von Humboldt

 II. Long term ecosystem experiments using outdoor plots

C) Paul Ehrlich

III. Global species diversity at about 7 million

D) David Tilman

IV. Rivet popper hypothesis

Choose the correct answer from the options given below:

1) A-II, B-III, C-I, D-IV          2) A-III, B-I, C-IV, D-II
3) A-I, B-III, C-II, D-IV          4) A-III, B-IV, C-II, D-I

Ans. 2 - A-III, B-I, C-IV, D-II

Explanation: Robert May places the global species diversity at about 7 million. Alexander von Humboldt gave the species are relationship. Paul Ehrlich gave the 'Rivet popper hypothesis'. David Tilman performed long term ecosystem experiments using outdoor plants.

Comments

Post a Comment

Popular posts from this blog

Molecules and their Interactions Relevant to Biology (PYQ's) (SET1)

By -
Image
Visit You tube channel for more MCQ's:  https://www.youtube.com/channel/UCDI5O7VNvIby-Faq_ptLefw Previous Year Questions (PYQ's) 1. From the following statements,                                                                                         (DEC 2016) a) Hydrogen, Deuterium and Tritium differ in the number of protons. b) Hydrogen, Deuterium and Tritium differ in the number of neutrons. c) Both Deuterium and Tritium are radioactive and decay to hydrogen and deuterium respectively. d) Tritium is radioactive and decays to helium. e) Carbon-14 decays to Nitrogen-14. f) Carbon-14 decays to Carbon-13. Pick the combination with all correct statements. A) a, b and f      B) b, d and e C) a, c and d      D) c, e and f Ans. B - b, d and e Explanation: Hydrogen, deuterium and tritium are isotopes. Isotopes differ in the number of neutrons  and hence statement "b" is correct. Deuterium is non-radioactive but tritium is radioactive. Tritium shows β decay and tritium dec
Read more

Chapter 1. Heredity and Evolution

By -
Image
1.     Heredity and Evolution Introduction: Basic unit of life is cell. Controlling center of cell is nucleus. Inside nucleus there are chromosomes. Chromosomes are made up of DNA. Segment of DNA is called as gene. ✱ Heredity and Hereditary Changes: Heredity: Transfer of characters from one generation to another via genes. Johann Gregor Mendel - Father of modern genetics. Hugo de Vries - Mutation Theory (1901). Walter and Sutton - Observed paired chromosomes in cells of grasshopper. Ostwald Avery, Maclyn McCarthy and Colin MacLeod - Except viruses, all living organisms have DNA as genetic material (1944). Francois Jacob and Jack Monad - Proposed a model for process of protein synthesis. Science of heredity is useful for: Diagnosis, treatment and prevention of hereditary disorders. Production of hybrid varieties of animals and plants. In industrial processes in which microbes are used. ✱ Structure of DNA (Deoxyribo Nucleic Acid) Chromosomes are made up of DNA. Chromosomes are always in
Read more

KINGDOM PROTISTA

By -
Image
 KINGDOM PROTISTA PHYLUM - PROTOZOA The name Protozoa (Protos = first, zoon = animal) comes from Goldfuss(1818) who, however used the names simply for the lower groups of zoophyta including protozoans, sponges, coelentrates, rotifers, and bryozoans. It was von  Siebold (1845) who, recognised the unicellular nature of Protozoa, first used and defined the name Protozoa in the present sense. The study of Protozoa is known as Protozoology. Characteristics of Protozoa: These are microscopic and colourless organisms. They are terrestrial or aquatic, free living or parasitic. Body exhibit radial or bilateral, spherical or irregular symmetry. Body is naked consisting of uninucleated or multinucleated protoplasm. Body is bound by a delicate membrane or a firm pellicle, theca or lorica or siliceous shell. Locomotion occurs by pseudopodia or cilia or flagella. They are holozoic or saprozoic (feeding on dead organic matter) or holophytic in nutrition. Digestion is intracellular and reserve food is
Read more