2024 Chordates Exams (All Answered Correctly)

What 5 features do all chordates have for at least some period of their life cycles? correct answers notochord, hollow dorsal nerve cord, pharyngeal slits, an endostyle, and a post-anal tail Name the 3 subphyla of the phylum chordata. correct answers cephalochordata, urochordata, vertebrata About how many species of cephalochordata are there? correct answers 25 Where do cephalochordata inhabit? correct answers shallow tropical and temperate oceans Are the cephalochordata a small or large branch of the animal kingdom? correct answers small What two other names do the cephalochordata go by? correct answers lancelets or amphioxus What does amphioxus mean? correct answers Greek for "both ends pointed" What are cephalochordata? correct answers small, eel-like and spend much of their time buried in the sand What defines a cephalochordata? correct answers the presence of a notochord that persists throughout life What is another name for the urochordata? correct answers tunicata What are urochordata commonly known as? correct answers sea squirts Explain the body of an adult tunicate. correct answers a sack with two siphons through which water enters and exits Explain the body of a larvae tunicate. correct answers free-swimming and exhibits all chordate characteristics What happens when a larva tunicate attaches to a hard substrate? correct answers it loses its tail and ability to move, and its nervous system largely disintegrates What does pelagic mean? correct answers in the open seas Some tunicates, called salps, live where? correct answers they're pelagic Describe salps. correct answers tunicates that typically have barrel-shaped bodies and may be extremely abundant in the open ocean What are siphons? correct answers tubular openings through which they draw in and expel water