ecology & bio environment geography section 1 MCQ Questions & Answers Detailed Explanation

Answer: (c)

There will be a decrease in the number of rats simply because rat is a prey to all the three of them and this leads to just a single conclusion that there is decrease in the number of rats.

Answer: (c)

A greenhouse gas (sometimes abbreviated GHG) is a gas in an atmosphere that absorbs and emits radiation within the thermal infrared range. This process is the fundamental cause of the greenhouse effect. The primary greenhouse gases in the Earth's atmosphere are water vapour, carbon dioxide, methane, nitrous oxide, and ozone.

Answer: (b)

Part of the Earth’s surface and atmosphere that contains the entire terrestrial ecosystem, and extends from ocean depths to about six kilometers above sea level. Not precisely demarkable, it contains all living organisms and what supports them soil, subsurface water, bodies of water, air and includes hydrosphere and lithosphere.

Answer: (c)

Deciduous means “falling off at maturity” “ or “tending to fall off”. It is typically used in order to refer to trees or shrubs that lose their leaves seasonally most commonly during autumn and to the shedding of other plant structures such as petals after flowering or fruit when ripe.

Common examples of deciduous trees include oak, maple, and hickory trees.

Answer: (c)

An ecosystem consists of communities of many different species living together, and all the the physical aspects of the particular habitat, such as like soil, water, and weather.

Answer: (c)

Deforestation is a consequence of a quantum jump in population and the consequent over-exploitation of our natural ecosystems for space, energy and materials. Expanding agriculture due to a burgeoning population base is one of the most important causes of deforestation.

As demands on agricultural products rise more and more land is brought under cultivation for which forests are cleared, grass-lands ploughed, uneven grounds levelled, marshes drained and even land underwater is reclaimed.