search
arrow-left Previous
Next arrow-right
Q: Which of the following is NOT a characteristic of a CHORDATES?
  • A. The central nervous system is dorsal, hollow and single
  • B. A posterior anal portion (tail) is apresent
  • C. The notochord is absent
  • D. The heart is abdominal
Correct Answer: Option C - Chordata fossils have been found early Cambrian explosion, 541 million year ago. Five characteristics features of Chordates present during sometime of their life cycles are a notochord a dorsal hollow tubular nerve cord, pharyngeal slits, endostyle/thyroid gland and a post anal tail. The Chordata, which includes the vertebrates, the most evolved animals, as well as two other subphyla tunicates and cephalochordates.
C. Chordata fossils have been found early Cambrian explosion, 541 million year ago. Five characteristics features of Chordates present during sometime of their life cycles are a notochord a dorsal hollow tubular nerve cord, pharyngeal slits, endostyle/thyroid gland and a post anal tail. The Chordata, which includes the vertebrates, the most evolved animals, as well as two other subphyla tunicates and cephalochordates.

Explanations:

Chordata fossils have been found early Cambrian explosion, 541 million year ago. Five characteristics features of Chordates present during sometime of their life cycles are a notochord a dorsal hollow tubular nerve cord, pharyngeal slits, endostyle/thyroid gland and a post anal tail. The Chordata, which includes the vertebrates, the most evolved animals, as well as two other subphyla tunicates and cephalochordates.