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Choose the correct answers from the alternatives given.
Reptiles moved fully onto land owning to:
A) Tough skin
B) Amniotes eggs
C) Internal fertilization
D) All of these

Last updated date: 18th Jun 2024
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Hint:Reptiles are ectothermic tetrapods that lay shelled eggs ashore and have tough and layered skin and lungs. On account of the advancement of impermeable, layered and tough skin, reptiles had the option to move onto land since their skin couldn't be utilized for breath in water.

Complete answer:
The early amniotes evolved around 350 million years prior. They look like little lizards; however they were not yet reptiles. Their amniotic eggs permitted them to move away from water sources and become bigger. They turned into the main land vertebrates. Likewise, reptile skin contains keratin, a water-safe substance that keeps up hydration and henceforth is intense and tough. Laying delicate shelled eggs is protected in the water; however land-abiding animals require an alternate regenerative procedure. Researchers think this is the reason reptiles developed a hard shell around their eggs and are fertilized internally as they are not in water.
Additional Information: Reptiles are tetrapods. Limbless reptiles have vestigial appendages. Reptiles lay eggs on land encased in shells. Indeed, even oceanic reptiles re-visitation of the land to lay eggs. They reproduce sexually having internal fertilization. A few animal groups are ovoviviparous, with the eggs staying in the mother's body until they are prepared to bring forth. Different species are viviparous, with the offspring brought into the world alive.
Therefore, the correct answer is option (D) All of these.
Note:Reptiles are ectotherms: organisms whose fundamental wellspring of body heat originates from the climate. This is as opposed to endotherms, which use heat created by metabolism to direct internal heat level. Notwithstanding being ectothermic, reptiles are classified as poikilotherms: organisms whose internal heat levels shift instead of stay stable. Reptiles have behavioral variations to help direct internal heat level, for example, luxuriating in sunny spots to heat up and discovering shady spots or going underground to chill off.