Tag: diversity in living world
Questions Related to diversity in living world
In protochordates, the epidermis is
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Absent
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Multilayered
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A few layered
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Single layered
Protochordata is included in the phylum Chordata. They possess a single layer of epidermis consisting of long columnar cells. In some cases such as Balanoglossus, these cells are ciliated. The lower layer dermis is absent in Protochordates. Thus, the correct answer is 'Single layered'.
Acorn Worm is
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Doliolum
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Salpa
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Balanoglossus
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Rhabdopleura
Acorn worm is an any of the soft-bodied invertebrate belonging to phylum Hemichordata.
Notochord like structure is present in hemichordates in the region
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Proboscis
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Collar
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Trunk
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Tail
In Hemichordates, there is a false notochord known as a stomochord.
Who raised the status of hemichordates from subphylum to phylum?
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Linnaeus
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Lamarck
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Horst
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Belfour
Hemichordates were earlier a subphylum in the phylum Chordata. Later they were made into a separate phylum.
Heart of hemichordates is
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Ventral
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Dorsal
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Lateral
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Absent
A) Ventral heart if present, is in non-chordates except Hemichordates.
Chorda dorsalis is
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Dorsal solid nerve cord
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Dorsal hollow nerve cord
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Notochord
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Stomochord
Chorda dorsalis originates from Latin. Chorda literally means 'sting' and dorsum means 'back'. Hence the answer is 'notochord' because it is the spinal column which is present on the dorsal side of an embryo. The notochord is a common aspect of all Chordates.
Notochord like structure of hemichordates is
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Protochord
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Stomochord
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Pallium
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Glomerulus
Hemichordates do not have a notochord but a false notochord.
Which one is a link between chordates and non chordates?
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Tadpole larva
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Sphenodon
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Balanoglossus
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Crocodilia
Which one belongs to hemichordata?
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Salpa
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Balanoglossus
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Petromyzon
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Myxine
Acorn worms are included in
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Cestoda
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Trematoda
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Hemichordata
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Echinodermata