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What happened during the Pennsylvanian period?
One is that the first reptiles (not dinosaurs!) appeared. The land during this peiod was swamp-forests.
Why are reptiles the first true land vertabrates?
They do not need water to reproduce.
Is an emu a vertebrate?
Yes, an emu is a vertebrate as are all other birds. They have an internal skeleton and a backbone which makes them vertebrates. All mammals, reptiles, amphibians and fish (true fish) are also vertebrates.
Why are most invertebrates aquatic and most vertebrates are terrestrial?
That is actually not true. The vast majority of animals, including vertebrates and invertebrates, are insects. All insects live on land. As for vertebrates, three of the seven classes are types of fish, and fish species equal the number of terrestrial vertebrate species, at approximately 32,000 types of fish compared with 10,000 reptiles, 10,000 birds, 5,000 mammals, and 7,000 amphibians.
Is a starfish an invertabrate?
Yes. A good rule of thumb is that only true fish (which includes sharks), birds, mammals, reptiles and amphibians are vertebrates usually. I DONT CARE -__-
Are swordfish invertebrates?
No, but it is a vertebrate. ;]A vertebrate is any animal with a spine, - that is, a set of vertebrae - including all fish, birds, reptiles, and mammals.
Did you evolve from fish?
All land vertebrates (including humans) can trace their origins back to the first fish that began crawling on the land using their strong, jointed fins. Eventually, the fish became more adapted to dry land and became amphibians. However, these amphibians still laid their eggs in water, and their young were tadpoles that spent all their time in water. The first true land vertebrates were reptiles, who were born on land and spent almost all their time on land. A small group of these reptiles became warmblooded and started growing hair, so they became the first mammals. Mammals remained small until the extinction of the dinosaurs, when they were given more room to grow, diversify, and give rise to humans.
Are animals related to birds?
Birds are more closely related to reptiles than they are to mammals. Birds, reptiles, and mammals all belong to a group of vertebrates called amniotes, which split off from amphibians. Amniotes split into two groups soon after they evolved: true reptiles and synapsids. Mammals are the only living synapsids today. Dinosaurs branched off from the reptiles and birds then evolved from the dinosaurs.
Do animals have bones?
true
Is a fish a invertebrate or vertebrate?
Fish are classified as vertebrates because they have an internal skeleton.
Are reptiles cold blooded true of fulse?
True. All reptiles are cold blooded
The dominant animal life during the Mesozoic Era was the dinosaur slash reptile True or False?
The dominant land animal life during the Mesozoic was reptiles and dinosaurs.However, it is important to note that dominant does not mean the most biodiverse, common, or consisting of the greatest biomass. It simply means that they were the most common large vertebrates. Insects, for example, have always beaten reptiles in biodiversity and I believe biomass, too.
