There is a concern over the increase in harmful algal booms in the sea waters of India. What could be the causative factors for this phenomenon ? 1. Discharge of nutrients from the estauraries. 2. Run-off from the land rung the monsoon. 3. Upwelling in the seas. Select the correct answer from the codes given below :

Due to some reasons, if there is a huge fall in the population of species of butterflies, what could be its likely consequence/consequences? 1. Pollination of some plants could be adversely affected.…

With reference to ecological niche, which of the following statements is/are correct? 1. It represents the range of conditions that it can tolerate the resources it utilizes and its functional role i…

The acdification of oceans is increasing. Why is this phenomenon a cause of concern? 1. The growth and survival of calcareous phytoplankton will be adversely affected. 2. The growth and survival of c…

In the context of ecosystem productivity, marine upwelling zones are important as they increase the marine productivity by bringing the 1. decomposer microorganisms to the surface. 2. nutrients to th…

Steel slag can be the material for which of the following? 1. Construction of base road 2. Improvement of agricultural soil 3. Production of cement Select the correct answer using the code given belo…