The most likely food sources for the first terrestrial tetrapods are insects. This implies the correct answer is B.
The first group of tetrapods are aquatic and the modern ones which originated from the first tetrapods are semi-aquatic: they look like fish tadpoles at the first stage of their life and later become aquatic and terrestrial animals.
<h2>Further Explanation</h2>
Tetrapods are animals that possess four limbs and some of them include reptiles such as dinosaur, birds, and mammals. These animals originated from Tetrapodomorpha (a clade of vertebrates that consists tetrapod) while the first tetrapods emerged about 367 million years ago.
However, the modern tetrapods are a clade of tetrapods vertebrates which include reptiles, birds, and mammals. The first tetrapods feed on insects and fish.
Some of the characteristics of tetrapods include:
- They have four limbs
- They have different adaptations of the muscles and skeletons that enable to move on land
- Their tongue is muscular and well developed
- They do not possess internal gills
- They possess a layer of dead cells which helps to reduce water loss on the surface their body
- Tripods are classified into two taxonomy groups, which include
- Amphibians (Lissamphibia): this includes salamanders, toads, frogs, etc.
- Amniotes (Aminota): the members of this group are birds, reptiles and mammals.
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KEYWORDS:
- first terrestrial tetrapods
- insect
- mammals
- amphibian
- amniotes
- fish
- aquatic
