which is not present in tadpole of frog
Which is not present in tadpole of frog?
Answer: Tadpoles, the larval stage of frogs, undergo remarkable transformations as they develop into adult frogs through a process called metamorphosis. During this transition, various anatomical features change, and certain structures that are present in tadpoles disappear or transform into different forms. Here are some characteristics that are not present in the tadpole stage of frogs:
1. Limbs: Tadpoles are typically characterized by a lack of limbs. Instead, they possess a tail that is used for swimming. Limbs develop later in the metamorphosis process as the tadpole transforms into a frog.
2. Lungs: While tadpoles have gills for respiration underwater, they do not possess lungs during their aquatic larval stage. Lungs develop later in the process as the tadpole transitions into a frog and starts breathing air.
3. Eyelids: Tadpoles lack movable eyelids. Instead, they have a protective membrane covering their eyes. Eyelids develop during metamorphosis, allowing the frog to blink and protect its eyes.
4. Eardrums (Tympanic Membrane): In tadpoles, the structures related to hearing are not fully developed. While tadpoles can sense vibrations in the water, they do not have eardrums like adult frogs. Eardrums develop during metamorphosis, enabling frogs to hear airborne sounds.
5. Adult Frog Characteristics: Various features specific to adult frogs, such as the adult digestive system, reproductive organs, and specialized skin glands, are not present in tadpoles. These structures develop gradually during metamorphosis, allowing the tadpole to transition into a fully functional adult frog.
Understanding the differences between tadpoles and adult frogs is essential for comprehending the fascinating process of metamorphosis in amphibians. As tadpoles undergo these remarkable changes, they adapt to different environments and lifestyles, ultimately emerging as terrestrial frogs ready to explore the world beyond the water.