FREE NEET Biology Practice MCQ Test: Biodiversity And Conservation Exercise 2 Questions Answers With Detailed Explanations [PDF]

Answer: (b)

Answer: (b)

Answer: (c)

Answer: (d)

Bishnois of Rajasthan protect Prosopis cineraria and Blackbuck religiously.

Answer: (d)

Answer: (d)

Ex-situ conservation is an offsite strategy for conservation of biological diversity in zoological park and botanical gardens respectively.

Answer: (d)

Creating biosphere reserve is the most effective approach to conserve the plant diversity in an area. A biosphere reserve is an ecosystem with plants and animals of unusual scientific and natural interest.

Answer: (c)

Insects have the highest number of species in nature, making up more than 70% of the total. That means out of every 10 animals on this planet, 7 are insects.

Answer: (b)

The Western Ghats have a greater amphibian species diversity than the Eastern Ghats. Thus, it is an example of species diversity which is defined as the diversity at the species level and is indicated by the variety and richness of the species of a region.

Answer: (a)

A - III, B - I, C - II

Answer: (d)

Cryopreservation is an advanced method of ex situ conservation. It involves preservation at –196°C in liquid nitrogen. It can maintain tissue culture, embryos, animal cells/tissues, spermatozoa indefinitely. The cryopreserved material is revived through special technique, when required.

Answer: (c)

The primary cause of human-induced extinction events is simply human overpopulation of planet Earth. The most important causal anthropogenic activities are habitat destruction and fragmentation.

Answer: (b)

Answer: (d)

Animal species should be preserved mainly because man cannot recreate a species of animals after its destruction and also preservation of these animal will provide better knowledge and understanding of their own species.

Answer: (c)

Ex situ (off site) conservation is conservation of selected rare plants/animals in places outside their natural homes. Ex situ conservation includes offsite collections, gene banks in vitro fertilization, cryopreservation techniques and tissue culture.

Answer: (c)

Answer: (a)

Diversity is due to the long term evolutionary changes. Adaptability to continuous changes in environmental conditions is important for natural selection of variants and variations generation after generation leading to emergence of diverse descendants.

Answer: (d)

Core zone or Natural zone area of a biosphere reserve is undisturbed and legally protected ecosystem. No human activity is allowed in this zone. Little human activity is allowed in the buffer zone whereas in transition zone, an active cooperation is present between reserve management and local people for activities like settlements, cropping, etc. Restoration region is degraded area which is selected for restoration to near natural form.

Answer: (d)

Answer: (b)

In natural extinction, the existing species are gradually replaced with better, adapted species due to the evolutionary progress, changes in environment, predators, etc. For other options, human activities play an important part in anthropogenic extinction, while natural calamities are involved in mass extinctions.