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. 2. There could be a drastic increase in the fungal infections of some cultivated plants. 3. It could lead to a fall in the population of some species of wasps, spiders, and birds. Select the correct answer using the code given below:

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. Ru…

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…

Which of the following practices can help in water conservation in agriculture? 1. Reduced or zero tillage of the land 2. Applying gypsum before irrigating the field 3. Allowing crop residue to remai…

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…

Which of the following is/are the function(s) of environment ? 1. Supplying resources 2. Sustaining life 3. Providing aesthetic services Select the correct answer using the code given below :