Subject Experts Solutions for Chapter: Ecology, Biodiversity and Environment, Exercise 1: Practice Exercise

Consider the following statements.

1. Biodiversity hotspots are located only in tropical regions.

2. India has four biodiversity hotspots, i.e. Eastern Himalayas, Western Himalayas, Western Ghats and Andaman and Nicobar Islands. 

Which of the statements given above is correct?

Consider the following statements regarding ecological pyramids.

1. Pyramid of energy is always upright, can never be inverted.

2. When energy flows from a particular trophic level to the next trophic level, some energy is always lost as heat at each step.

Choose the correct option.

Consider the following layers of the atmosphere.

1. Troposphere

2. Stratosphere

3. Mesosphere

4. Thermosphere

Which one among the following is the correct sequence of the layers with  increasing altitude from the earth's surface?

Which of the following groups of plants can be used as indicators of ${\mathrm{SO}}_2$ pollution of air?

Which one of the following is not a greenhouse gas?

'Sal' tree is a:

Spruce and cedar are tree varieties of 

One of the main causes of air pollution in cities is emissions from vehicles like cars and trucks. Cars emit various pollutants, which are bad for human health when inhaled, like

1. Nitrogen oxide.$\left({\mathrm{NO}}_{\mathrm{x}}\right)$

2. Carbon monoxide. $\left(\mathrm{CO}\right)$

3. Carbon dioxide. $\left({\mathrm{CO}}_2\right)$

4. Benzene

Which of the above pollutants are not tolerated by human being even at very low level?