🌱 Environment & EcologyUPSC 2019Sustainable Development

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 are viviparous.Which of the statements given above are correct?

a1 and 3 only
b2, 3 and 4 only
c2 and 4 only
d1, 2, 3 and 4
✓ Correct answer: d) 1, 2, 3 and 4
ExplanationStatement 1 is correct: Many species of turtles are herbi- vores, especially those that live in freshwater or on land.For instance, the green sea turtle (Chelonia mydas) is primarily herbivorous, feeding on seagrass and algae.Similarly, the Aldab- ra giant tortoise is also herbivorous, feeding mainly on grasses and leaves.Statement 2 is correct: Several species of fish are herbivores, consuming algae, aquatic plants, or detritus.Examples include parrotfish, which graze on algae, and certain species of sur- geonfish, which feed on marine plants.Statement 3 is correct: Some marine mammals are herbi- vores, notably the manatee and dugong, which feed on sea- grasses.These mammals are specialized to thrive on a plant- based diet.Statement 4 is correct: Boa Constrictors and Green Anacon- das are examples of viviparous snakes, meaning they give birth to live young with no eggs involved at any stage of development.SUPER HINT “Some” = possibility logic, not absolute.If even one spe- cies of organism does something, the statement is likely correct.UPSC uses “some” to lower the burden

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