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BlakeChordates are a group of animals that are characterized by the presence of a notochord, a hollow dorsal nerve cord, pharyngeal slits, and a post-anal tail at some point in their life cycle. This diverse group includes vertebrates like fish, birds, and mammals, as well as some invertebrate species.
Chordates are animals in the phylum chordata. These animals have a notochord some point in their lives (in us and other mammals, this notochord is changed into the disks between each vertebra). These animals also have a dorsal, hollow nerve cord, pharyngeal slits or clefts, and a muscular post anal tail.
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Are chordates eukaryote?
Chordates are a group of animals which include vertebrates (animals having a spinal column), so yes, birds are chordates.
Are lancelets not true chordates?
Lancelets are considered true chordates because they possess a notochord, dorsal nerve cord, pharyngeal slits, and a post-anal tail at some stage in their life cycle, which are characteristic features of chordates. They are believed to represent an early evolutionary stage of the chordates.
Are chordates are harmful?
Chordates are a diverse group of animals that includes humans, and they are not inherently harmful. While some species of chordates may pose a threat due to factors like venom or aggression, the majority of chordates play important roles in ecosystems and are not harmful to humans.
What are the lower chordates?
Lower chordates refer to a group of simple, marine invertebrate animals that belong to the phylum Chordata but do not possess a backbone or vertebral column. Examples of lower chordates include tunicates, lancelets, and hagfish. They are considered primitive chordates with some characteristics of vertebrates.
Do chordates have large brains?
Not necessarily. While some chordates, like humans and other mammals, have relatively large brains compared to their body size, not all chordates have large brains. Chordates range in complexity from simple organisms like tunicates to more advanced vertebrates like birds and primates.
