If a particular animal hs shelled eggs, hairand teats of the bodyand has cloaca, it maybe a connecting link betweena)Reptiles and birdsb)Birds and mammals c)Reptiles and mammalsd)None of themCorrect answer is option 'C'. Can you explain this answer?

Question

Answer

Mamals evolved from a group of reptiles called therapsids ,humans share characters with them like four limbs ,pentadactyl digits, cephalization and polarity present cleidoic eggs ( sometimes refered as amniotic eggs )

Answer

Mammals evolved from a set of reptiles called the therapsids, we share good amount oif characteristics with them, like four limbs, pentadactyl digits, cephalization and polarity present, cleidoic eggs sometimes reffered to as amniotic eggs etc

Answer

Lycaenops was a mammal-like reptile. It is considered a missing link between reptiles and mammals. Laying shelled eggs is a characteristic of birds and reptiles. Having hair, teats on body and cloaca are characteristics of animals. So, particular animal has shelled eggs, hair and teats on the body and has cloaca, it may be a connecting link between reptiles and mammals. Thus, option C is correct and other options are wrong.

Answer

Connecting Link between Reptiles and Mammals

The animal described in the question, which has shelled eggs, hair and teats on its body, and a cloaca, is a connecting link between reptiles and mammals.

Shelled Eggs

One of the characteristics of reptiles is that they lay eggs with a hard, protective shell. This is seen in animals like turtles, snakes, and crocodiles. On the other hand, mammals give birth to live young, with the exception of monotremes like the platypus and echidna that lay eggs. So, the presence of shelled eggs suggests a connection to reptiles.

Hair and Teats

Mammals are unique in having hair or fur on their bodies. This adaptation helps with insulation, protection, and sensory perception. Additionally, all mammals have mammary glands that produce milk to nourish their young. The presence of hair and teats indicates a connection to mammals.

Cloaca

A cloaca is a common opening for the urinary, digestive, and reproductive tracts found in reptiles, birds, and a few other animal groups. In contrast, mammals have separate openings for these systems. Therefore, the presence of a cloaca suggests a connection to reptiles and birds.

Conclusion

Considering all the characteristics mentioned, the animal in question exhibits features from both reptiles and mammals. It lays shelled eggs like reptiles, has hair and teats like mammals, and possesses a cloaca like reptiles and birds. These combined characteristics make it a connecting link between reptiles and mammals.

Incorrect Options

- Option 'A': Reptiles and birds are both egg-laying animals, but birds do not have hair or teats, making them distinct from the animal in question.
- Option 'B': Birds and mammals are both warm-blooded animals that have the ability to regulate their body temperature. However, birds do not possess hair or teats, making them different from the animal described.
- Option 'D': This option can be eliminated as the animal in question shows characteristics of both reptiles and mammals, making it a connecting link between the two.

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