506: Which of the following States has the largest coastal area in India?
(a) Kerala
(b) Tamil Nadu
(c) Karnataka
(d) Andhra Pradesh
507: You are asked to import ostrich, platypus and koala bear. Which country would you select to go where you get all these three ?
(a) Japan
(b) Australia
(c) New Zealand
(d) Canada
508: Contour bunding is a method of conservation used in
(a) desert margins, liable to strong wind action
(b) low flat plains, close to stream courses, liable to flooding
(c) scrublands, liable to spread of weed growth
(d) None of the above
Explanation:
Contour bunding is a traditional low cost method of soil conservation suitable for sloping land; it promotes water retention and helps prevent erosion.
Contour bunding is a proven sustainable land management practice for marginal, sloping, and hilly land where the soil productivity is very low.
509: Consider the following statements:
1. Some species of turtles are herbivores.
2. Some species of fish are herbivores.
3. Some species of marine mammals are herbivores.
4. Some species of snakes viviparous.
Which of the statements given above arc correct?
(a) 1 and 3 only
(b) 2, 3 and 4 only
(c) 2 and 4 only
(d) 1, 2, 3 and 4
Explanation:
Green sea turtles eat seagrasses and algae, though juveniles snack on crabs, sponges, and jellyfish. Parrotfish are algae eaters. They obtain the algae by ripping small chunks of coral from a reef. The fish's grinding teeth, located in its throat, pulverize the coral. The teeth allow the fish to extract the algae from the center of the polyp inside.Manatees, sometimes called sea cows, are large mammals that live in warm sea waters. They live in shallow coastal areas and feed on sea vegetation. Snakes that are viviparous nourish their developing young through a placenta and yolk sac, something that is highly unusual among reptiles.
Source: https://sciencing.com/list-herbivores-ocean-8599405.html
510: Seasonal migration of men and animals from lower to higher altitudes during the summer is known as
(a) Nomadism
(b) Migration
(c) Transhumance
(d) Pastoralism