These are organisms which remain attached to stems and leaves of rooted plants or substances emerging above the bottom mud such as sessile algae and their associated group of animals. These are:
Consider the following statements about the Photic zone:
1. It is the lighted and usually well-mixed portion that extends from the lake surface down to where the light level is 1% of that at the surface.
2. Respiration activity takes place.
3. The depth of this zone depends on the transparency of water.
Which of these statements is/are correct?
1 Crore+ students have signed up on EduRev. Have you? Download the App |
Consider the following statements:
1. The water temperature changes more rapidly than the temperature of the air.
2. Larger amounts of heat energy must be added to or taken away from water to raise or lower its temperature.
Which of these statements is/are correct?
Which of the following are correctly matched:
1. Oligotrophic - very high nutrients
2. Mesotrophic - moderate nutrients
3. Eutrophic - very low nutrients
Which of these statements are correct?
Consider the following statements about the Point Sources of Pollution:
1. Directly attributable to one influence.
2. In point source nutrient waste travels directly from source to water.
3. Point sources are difficult to regulate.
Which of these statements is/are correct?
Consider the following statements about the effects of eutrophication:
1. Affects navigation due to decreased turbidity
2. Increased biomass of inedible toxic phytoplankton
3. Increase in the bloom of gelatinous zooplankton
4. Increase the biomass of benthic and epiphytic algae
Which of these statements is/are correct?
Which of the following can help to mitigate the effects of eutrophication?
1. Nitrogen testing
2. Organic farming & Integrated Farming System
3. Nutrient enrichment of water
Which of these statements is/are correct?
The National Lake Conservation Programme (NLCP) considers lakes as standing water bodies which:
1. Have a minimum water depth of 3 m,
2. Generally cover a water spread of more than ten hectares
3. Have no or very little aquatic vegetation
Which of these statements is/are correct?
Consider the following characteristics of the estuary ecosystem:
1. It has a free connection with open sea
2. An estuary has very little wave action, so it provides a calm refuge from the open sea
Which of these statements is/are correct?
Consider the following statements:
1. Mangroves of Bhitarkanika is the largest in the Indian subcontinent
2. Harbour high mangroves found in Gulf of Kachchh
Which of these statements is/are correct?
545 videos|948 docs|362 tests
|
545 videos|948 docs|362 tests
|