Tag: introduction to plant kingdom
Questions Related to introduction to plant kingdom
In a biological community, Gauze's principle explains.
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Competition among different species under unlimited resources
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Competitive exclusion of an inferior species due to the limited natural resources
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Coexistence of closely related species due to resource partitioning
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Intra specific competition due to limited natural resources
Which one of the following statements is incorrect about the occurrence of notochord?
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It is present only in larval tail in ascidian.
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It is replaced by a vertebral column in adult frog.
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It is absent throughout life in humans from the very beginning.
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It is present throughout life in Amphioxus.
Humans belong to the Phylum Chordate. Animals belonging to the Phylum Chordata possess a notochord either during early embryonic life or throughout the embryonic life. In some, it Is replaced by vertebral column. In humans, notochord is present only In the embryonic stage, it is replaced by vertebral column in the adult form.
The term Classification was coined by
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Theophrastus
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A.P.de candolle
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Aristotle
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Linnaeus
- The classification term was coined by 'Theophrastus'.
- The term taxonomy was coined by A. P. de Candolle.
- Aristotle divided animals into two groups based on whether they have red blood or not.
- Linnaeus proposed a binomial system of nomenclature.
- So, the correct option is 'Theophrastus'.
Classification deals with
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Identification of organisms
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Arranging organisms into groups
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Arranging organisms in herbaria and museums.
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Naming, identification and grouping of organisms
Term vertebrate and invertebrate are given by
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John Ray
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Linneaus
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Lamark
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Leucart
Lamarck, the French naturalist was the one who introduced the taxonomic distinction between vertebrates and invertebrates.
John ray was the first to give the definition of 'species'.
Carl Linnaeus gave the 'binomial nomenclature' for living beings.
Nerve cord is in ............ position in invertebrates.
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Dorsal
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Lateral
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Ventral
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Absent
Which of the following are not the trends observed in the evolution of the central nervous system in invertebrates?
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Increased size of cerebral ganglia and formation of a 'brain'
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Reduction in the number of nerve cords
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Replacement of nerve cords by nerve nets
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Dominance of the ventral pair of nerve cords
The nervous system of animals has evolved a lot from metazoans to mammals. Cnidarians happen to have the simplest nervous system comprising mainly nerve nets. It is assumed that this is the group of animals that the modern nervous system has evolved from. Hence, it can be said that nerve nets have been replaced by nerve nets and not the other way around.
Valveless single chambered heart is found in
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Herdmania
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Scoliodon
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Catla
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Amphioxus
.......... are called as moss animals.
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Loricifera
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Ectoprocta
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Acanthocephala
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Gastrotricha
The Bryozoa, also known as Polyzoa, Ectoprocta or commonly as moss animals, are a phylum of aquatic invertebrate animals. They are filter feeders that sieve food particles out of the water using a retractable lophophore a "crown" of tentacles lined with cilia. Most marine species live in tropical waters, but a few occur in oceanic trenches, and others are found in polar waters.
Larva occurs in
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Invertebrates
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Vertebrates
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Both A and B
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None of the above