No
Some insects have a life cycle: egg to nymph to adult. The nymph stage is the pre-adult form. Dragonflies, termites, and other insects have a nymph form.
some are, some aren't. Reptiles are vertebrates and cold-blooded.
Some of the reptiles that are vertebrates: -snake -lizard -tortoise -crocodile
Vertebrates do not have exoskeletons. However, they do have internal organs, vertebral columns, and tails. Lampreys are vertebrates that also do not have jaws.
Vertebrates do not typically go through complete metamorphosis in the way that some invertebrates, like insects, do. However, certain vertebrates, particularly amphibians like frogs, undergo a form of metamorphosis, transitioning from a larval stage (tadpole) to an adult form. This process is characterized by significant physiological changes, but it is not considered "complete" metamorphosis in the strictest sense. Other vertebrates, such as fish and reptiles, generally develop through more direct growth stages without a dramatic transformation.
no
90% of animals are invertebrates and only 10% are vertebrates they have backbones
The dragonfly nymph has gills.
Nautilus, narwhal, nymph
Vertebrates are animals with a backbone, so some vertebrates live in water (e.g. fish) but others live on land (e.g. cows).
Amphibians are cold-blooded vertebrates that typically have moist, scaleless skin, lay eggs in water, and undergo metamorphosis from larval to adult forms. They usually have four legs (although some are legless) and breathe through their skin or lungs. Amphibians include frogs, toads, salamanders, and newts.
Yes some of it does.