Nov 23, 2021 · Chordates: all vertebrates, plus tunicates, hagfish, and lampreys, which contain a notochord, pharyngeal slits, endostyle, and post-anal tail at some point during development

The smallest chordates (e.g. some of the tunicates and gobioid fishes) are mature at a length of about 1 cm, whereas the largest animals that have ever existed are chordates: some sauropod dinosaurs reached more than 20 m and living blue whales grow to about 30 m. ... For a more detailed explanation of the different ToL page types, have a look ...

Pikaia gracilens is an extinct, primitive chordate animal known from the Middle Cambrian Burgess Shale of British Columbia.Described in 1911 by Charles Doolittle Walcott as an annelid, and in 1979 by Harry B. Whittington and Simon Conway Morris as a chordate, it became the "most famous early chordate fossil," or "famously known as the earliest" chordates. ...

Dec 17, 2021 · These types of plants are known as xerophytes. The plant adaptations in arid environments include having a very thick stem to store water. The plant adaptations in arid environments include having ...

One type of invertebrate respiratory system is the open respiratory system composed of spiracles, tracheae, and tracheoles that terrestrial arthropods have to transport metabolic gases to and from tissues. The distribution of spiracles can vary greatly among the many orders of insects, but in general each segment of the body can have only one pair of spiracles, each of which …

Convergent evolution is the independent evolution of similar features in species of different periods or epochs in time. Convergent evolution creates analogous structures that have similar form or function but were not present in the last common ancestor of those groups. The cladistic term for the same phenomenon is homoplasy.The recurrent evolution of flight is a classic …

Conversations regarding the ethics of eating meat are focused on whether or not it is moral to eat non-human animals.Ultimately, this is a debate that has been ongoing for millennia, and it remains one of the most prominent topics in food ethics.. Individuals who promote meat consumption do so for a number of reasons, such as health, cultural traditions, religious …

Vertebrates (/ ˈ v ɜːr t ə b r ɪ t s,-ˌ b r eɪ t s /) comprise all animal taxa within the subphylum Vertebrata (/ ˌ v ɜːr t ə ˈ b r eɪ t ə /) (chordates with backbones), including all mammals, birds, reptiles, amphibians, and fish.Vertebrates represent the overwhelming majority of the phylum Chordata, with currently about 69,963 species described. Vertebrates comprise such groups ...

Figure 1.1 This NASA image is a composite of several satellite-based views of Earth. To make the whole-Earth image, NASA scientists combine observations of different parts of the planet. (credit: NASA/GSFC/NOAA/USGS)

Apr 24, 2018 · There are several classes of chordates, including, fish, birds, reptiles, mammals and amphibians. Class Reptilia. ... There are two primary types in the Agnatha class, which are hagfish and lampreys. The hagfish are specialized scavengers. Hagfish are also relatives of the slime fish and try to shed their slimy coats and make new ones by ...