a tadpole differs from an adult frog in some ways. consider the given points and write the differences between them.
a)breathing method
b)habitat
c)food
Answers
Answer:
Tadpoles hatch from frogs' eggs and can only survive in water. As they undergo metamorphosis to become adult frogs they change in many ways, losing their swimming tails and developing legs. Both need to take in oxygen from their environment, and the way they respire also changes as they develop.
Explanation:
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Answer:
Amphibians have been around for over 350 million years with the earliest known frogs appearing somewhere around 190 million years. These amphibians are crucial to the environment as they provide scientists with an indication of the quality around them. Frogs begin their lifecycle in egg form and then hatch as aquatic larvae known as tadpoles. These tadpoles will in turn morph into adult frogs. The life cycle of a frog is one of the most extraordinary cases of transformation in vertebrates and much attention is made to the change from tadpole to adult frog [1].
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Structural appearance of tadpoles
Baby frogs are known as tadpoles or pollywogs. Unlike adult frogs, they very commonly look like fish and lack limbs. Instead they have long, paddle-like tails that allow them to move and survive in water. As they grow, their physical characteristics change at different stages of their life cycle together with their behavioural patterns and feeding habits [1]. As time passes, their body begins to change into a young adult. The tail used for paddling reduces in size and limbs begin to develop. At first, rear legs will form followed by front limbs. The jaw and skull structure is also distinctly different in tadpoles. In terms of their skull, they have cartilage instead of a hardened bony structure as adult frogs do. They also possess smaller teeth that allow them to chew plants and organic matter during feeding [2]. As tadpoles grow in size, their head structure begins to change, leading to the development of a more defined jaw and the formation of a tongue. In addition, the gills make way for the lungs and the intestines shorten in length in order to adapt to the diet of adult frogs. Tadpoles are also known to have a two chambered heart and a single loop of vessels [3].
Structural appearance of frogs
While tadpoles lack limbs and possess long tails, adult frogs on the other hand have two hind limbs and two fore limbs. The hind limbs are exceptionally powerful and this, together with their webbed feet helps them to jump great distances and swim. Adult frogs have a more developed bony skull and form a defined tongue that can be used for feeding [2]. The tongue is muscular and replaces the teeth. Adult frogs have a three chambered heart and two loops of vessels which develop over time as well as lungs to aid breathing
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