Practice free Biodiversity and its Conservation (Botany) NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
The world summit on sustainable development:
Which of the following is not correct?
Page number-267
15.2.1 How do we conserve Biodiversity?
15.2 Biodiversity Conservation
Biodiversity and Conservation
Cattle ranches are known to causes acute green house effect. This is due to
(b) : Cattle ranching refers to practice of raising grazing livestock such as cattle or sheep for meat and wool, etc. The area of landscape meant primarily for cattle ranching is called a ranch. The practice has lead to accelerated deforestation and contributed to increased methane gas concentration in atmosphere. Whatever cattle eat; is subjected to the action of methanogens (bacteria) harbouring the stomach (rumen) of cattle. The action of these bacteria on food material produces methane gas which is released through cattle fart into the earth's almosphere where it absorbs heat just like carbon dioxide, contributing to global warming
Select the correct statement.
(c) : Particulate matter mainly includes dust, soot particles, volatile hydrocarbons, some sulphate and metallic residues emitted into the air by sources such as factories, power plants, vehicles, etc. PM is usually divided into different classes based on size ranging from total suspended matter (TSP) to PM-10 (particles with diameter of 10 μ or less) to PM-2.5 (particles with diameter of 2.5 μ or less). Smallest particles pose highest human health risk. Larger particles (10 μ) can easily be expelled from lungs through mucus but finer particles ( 2.5 μ) penetrate deep in lungs and can cause severe lung damage including lung cancer.
A large quantity of urban sewage is drained to nearby village river. Which among the given conditions would happen after mixing of sewage into the river?
(i) Biochemical oxygen demand (BOD) of receiving water body increases.
(ii) Dissolved oxygen of receiving water body decreases.
(iii) It will not cause mortality among fishes and other aquatic creatures
(iv) It will lead to nutrient enrichment of receiving water body.
(b) :When sewage, having biodegradable organic matter is released in water body micro-organisms involved in biodegradation of organic matter in the receiving water body consume a lot of oxygen to decompose the sewage and as a result there would be a sharp decline in dissolved oxygen downstream from the point of sewage discharge, and biological oxygen demand (BOD) would increase Presence of large amount of nutrients in water causes excessive growth of planktonic (free- floating) algae, called algal bloom. Algal bloom causes deterioration of water quality and fish mortality
One greenhouse gas contributes 14% to total global warming and another contributes 6%. These are respectively identified as
(b)
Which one option is incorrectly matched regarding biological magnification of DDT in aquatic ecosystem.
(d) The correct matching is as follows: Zooplankton - 0.04 ppm
In biological magnification of DDT, concentration of DDT is 0.003 ppm in phytoplanton.
Which one is matched correctly?
(a) Black foot disease caused by arsenic is a severe form of peripheral vascular disease. It has been observed in Taiwan.
Flouride - Skeletal fluorosis
Mercury - Minamata disease
Cadmium - Itai-itai
Green muffler play a important role against
(a) Green plant on roadsides are often considered as green mufler. These green belt minimise noise pollution.
The government of india in 1980s has introduced a concept to work closely with the local communities for protecting and managing forests. The concept is
Joint Forest Management (JFM) is introduced so as to work closely with the local communities for protecting and managing forests.
The thickness of the ozone is measured in terms of:-
The thickness of the ozone in a column of air from the ground to the top of the atmosphere is measured in terms of Dobson Units (DU).
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