General Studies II
Consider the followmg Velocity-Time graph. It shows two trains starting simultaneously on parallel tracks.
With reference to the above graph, which one of the following statements is not correct ?
A. Train B has an initial acceleration greater than that of Train
|B||Train B is faster than Train A at all times.|
|C||Both trains have the same velocity at time to’|
|D|| Both trains travel the same distance in time to units.
Read each of the following two passages and answer the items that follow. Your answers to these items should be based on the passages only.
Ecosystems provide people with a variety of goods and services; food, clean water, clean air, flood control, soil stabilization, pollination, climate regulation, spritual fulfilment and aesthetic enjoyment, to name just a few. Most of these benefits either are irreplaceable or the technology necessary to replace them is prohibitively expensive. For example, potable fresh water can be provided by desalinating sea-water, but only at great cost.
The rapidly expanding human population has greatly modified the Earth’s ecosystems to meet their increased requirements of some of the goods and services, particularly food, fresh water, timber, fibre and fuel. These modifications have contributed substantially to human well being and economic development. The benefits have not been equally distributed. Some people have actually been harmed by these changes. Moreover, short-term increases in some ecosystem goods and services have come at the cost of the long-term degradation of others. For example, efforts to increase the production of food and fibre have decreased the ability of some ecosystems to provide clean water, regulate flooding and support biodiversity.