You chordatesare animals that belong to the Phylum Chordata, have symmetry bilateral, notochord, dorsal nerve tube and complete digestive system.
We prepared a list of exercises on chordates so you can test your knowledge about these animals that are divided into three groups: urochordates, cephalochordates It is vertebrate.
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1) (UFRGS) The following are differential and exclusive characteristics of chordates present at least in the first stages of development:
a) bilateral symmetry, segmented body and notochord.
b) segmented body, dorsal nerve tube and gill slits.
c) bilateral symmetry, dorsal nerve tube and gill slits.
d) dorsal nerve tube, notochord and gill slits.
e) bilateral symmetry, segmented body and dorsal nerve tube.
2) Urochordates have an envelope in their body formed by a polysaccharide similar to cellulose. Mark the alternative that correctly indicates the name of this coating:
a) endostyle.
b) siphon.
c) sinusoid.
d) tunic.
e) cirrus.
3) (UNICID) Sharks and dolphins are included in the same group, due to their evolutionary kinship, which is due to the presence of anatomical and physiological characteristics, both in the embryonic and in the adult. Among these characteristics, it is correct to mention:
a) dorsal neural tube, notochord, and pharyngeal slits.
b) spinal cord, bony skeleton and anterior fins.
c) dorsal nervous system, skull and dual circulation.
d) atrophied coelomic cavity, caudal fin and posterior fins.
e) mesoderm, vertebral column and gill respiration.
4) The swim bladder, a structure present in some fish, is responsible for helping these animals to remain at certain depths. In relation to this structure, mark the alternative that best explains its operation.
a) When filling with water, the swim bladder causes the fish to become less dense than the medium and rise to the surface.
b) When filling with water, the swim bladder causes the fish to become denser than the medium and rise to the surface.
c) When filling with air, the swim bladder causes the fish to become less dense than water, causing it to submerge.
d) When filling with air, the swim bladder causes the fish to become less dense than water and rise to the surface.
5) The phylum Chordata can be divided into three major groups: the urochordates, cephalochordates and craniates. What differentiates the craniates from these other groups is the presence of:
a) notochord.
b) dorsal nerve tube.
c) pharyngeal slits.
d) post-anal tail.
e) spine.
6) (FGV) The chordate phylum comprises four subphyla: hemichordates, urochordates, cephalochordates and vertebrates. The first three are usually grouped under the name of protochordates. The notochord exists:
a) only in the embryonic phase of vertebrates and throughout the life of protochordates.
b) in the adult phase of vertebrates and in the embryonic life of protochordates.
c) in the embryos of all chordates and in the adult stage of only a few protochordates.
d) throughout the life of chordates.
e) only in the embryonic stage.
7) One of the main characteristics of chordates is the presence of a structure called notochord. In relation to this structure, mark the correct alternative:
a) occurs only in the adult phase of chordates.
b) disappears in adult vertebrates.
c) will give rise to the nervous system.
d) is present in chordates at all stages of life.
8) (FUVEST) In the development of chordates, three general characters stand out, distinguishing them from other animals. Tick the alternative that includes these three characters:
a) notochord, three germ layers, dorsal nerve tube.
b) segmented body, complete digestive tube, dorsal nerve tube.
c) bilateral symmetry, segmented body.
d) bilateral symmetry, three germ layers, notochord.
e) dorsal nerve tube, notochord, gill slits in the pharynx.
9) The phylum Chordata includes quite different representatives, but some features are shared by all. Among the alternatives below, mark the only one that represents a feature not found in chordates.
a) Presence of notochord during embryonic development.
b) Presence of pharyngeal slits in at least one stage of life.
b) Presence of metamers.
d) Absence of coelom during the adult phase.
e) Post-anal tail during development.
10) (UFJF) Regarding the animals of the Chordata group, in addition to the presence of the notochord and the propelling tail, which of the characters below distinguish them from other groups of animals?
a) Pharyngeal slits and dorsal nerve tube.
b) Pulmonary or gill breathing and circulatory system with heart.
c) Coelom derived from the archenteron and indeterminate radial cleavage.
d) Bilateral and triploblastic systems.
e) Enterocoelomates and metamerized body.
1 – d
2 – d
3 – the
4 – d
5 – and
6 – c
7 – b
8 – and
9 – d
10 – the
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