Tag: biodiversity and its classifications

Questions Related to biodiversity and its classifications

Separated cells of two vertebrates are mixed up. They will

zoology biodiversity and its classifications vertebrates characteristics of vertebrates classification of organisms

  1. Aggregate species-wise

  2. Aggregate tissue-wise

  3. Aggregate species-wise and then tissue-wise

  4. Aggregate species-wise and then reconstruct the animals.

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Correct Option: B

Heart pumps only impure blood in case of

zoology biodiversity and its classifications vertebrates characteristics of vertebrates classification of organisms

  1. Sharks

  2. Whale

  3. Lizard

  4. Frog

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Correct Option: A
Explanation:
  • The heart pumps only impure blood in sharks. Sharks have a two-chambered heart which is an S-shaped tube. It has an atrium and ventricle. The blood is pumped by the heart through the afferent branchial arteries to capillaries in the gills, where the blood is oxygenated). 
  • The blood then flows through efferent branchial arteries, through the tissues of the body, and back to the heart in veins. Sharks have low blood pressures; the walls of the pericardium are rigid, creating suction within the pericardium to maintain the flow of blood. To circulate blood throughout their bodies, many sharks must swim continuously. 
  • The blood flow is similar to humans because blood is pumped by the heart to the rest of the body by arteries and returned to the heart by veins. 
  • A difference is that humans have 4-chambered hearts while sharks only have two chambers.

Which one of the following is an example of viviparous animal?

zoology biodiversity and its classifications vertebrates characteristics of vertebrates classification of organisms

  1. Amphibians

  2. Bony fish

  3. Fish

  4. Shark

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Correct Option: D
Explanation:

Viviparous sharks give birth to live young. The number of pups in a litter ranges from 2-20 or more. For example, the Bull sharks, Whitetip reef shark, Lemon shark, Blue shark, Mako, Porbeagle, Salmon shark, the Silvertip shark, and Hammerheads.

Amphibians are oviparous because the young hatch after the egg is laid.
Bony fish and fish are oviparous in nature.

Herdmania is

zoology biodiversity and its classifications vertebrates characteristics of vertebrates classification of organisms

  1. Sea purse

  2. Sea squirt

  3. Sea potato

  4. Both B and C

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Correct Option: B
Explanation:

Herdmania is an ascidian urochordate.

A) Sea purse is the egg case of a shark.
B) Sea squirt is another name for ascidian urochordates.
C) Sea potato is an echinoderm.
Answer is 'sea squirt'.

Which statement best explains why invertebrates regenerate lost tissue more readily than most vertebrates do? 

biology biodiversity and its classifications life introduction to plant kingdom classification of organisms

  1. Invertebrates contain specialized cells that produce the hormones necessary for this process.

  2. Invertebrate cells exhibit a higher degree of uncontrolled cell division than vertebrate cells do.

  3. Invertebrate animals reproduce asexually, but vertebrate animals reproduce sexually.

  4. Invertebrate animals have more undifferentiated cells than vertebrate animals have.

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Correct Option: D
Explanation:
Invertebrate animals have more undifferentiated cells than vertebrate animals have, which explains that they regenerate lost tissue more readily than most vertebrates. Invertebrates, animals without a backbone, such as an earthworm, are simpler than vertebrates, such as a human. Therefore, their cells are not as complex and they may be able to regenerate or grow lost body parts easier than a more complex animal. 
Therefore, the correct answer is option D.

The term Classification was coined by

biology biodiversity and its classifications life introduction to plant kingdom classification of organisms

  1. Theophrastus

  2. A.P.de candolle

  3. Aristotle

  4. Linnaeus

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Correct Option: A
Explanation:
  • 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 

biology biodiversity and its classifications life introduction to plant kingdom classification of organisms

  1. Identification of organisms

  2. Arranging organisms into groups

  3. Arranging organisms in herbaria and museums.

  4. Naming, identification and grouping of organisms

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Correct Option: B
Explanation:
Classification deals with the arrangement of animals and plants in taxonomic groups according to their observed similarities and differences (including at least kingdom and phylum in animals, division in plants, and class, order, family, genus, and species).

Term vertebrate and invertebrate are given by 

biology biodiversity and its classifications life introduction to plant kingdom classification of organisms

  1. John Ray

  2. Linneaus

  3. Lamark

  4. Leucart

Show answer
Correct Option: C
Explanation:

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.

Leuckart is remembered for his work in parasitology, particularly research regarding tapeworm and trichinosis. 
So, the correct answer is option C.

Nerve cord is in ............ position in invertebrates.

biology biodiversity and its classifications life introduction to plant kingdom classification of organisms

  1. Dorsal

  2. Lateral

  3. Ventral

  4. Absent

Show answer
Correct Option: C
Explanation:
The ventral nerve cord is a bundle of nerve fibers, typically a solid double strand (pair) of nerve cords, that runs along the longitudinal axis of some phyla of elongate invertebrates, and forms part of the invertebrate central nervous system. In most cases, this nerve cords runs ventrally, below the gut, and connects to the cerebral ganglia. Among the phyla exhibiting ventral nerve cords are nematodes (roundworms), annelids (such as earthworms, and arthropods (such as insects and crayfish).
The ventral nerve cord usually consists of a pair of partially fused nerve trunks running longitudinally along the ventral plane of the animals, from the anterior to posterior (the thoracic and abdominal tagma in the arthropods).

So, the correct answer is option A.

Which of the following are not the trends observed in the evolution of the central nervous system in invertebrates?

biology biodiversity and its classifications life introduction to plant kingdom classification of organisms

  1. Increased size of cerebral ganglia and formation of a 'brain'

  2. Reduction in the number of nerve cords

  3. Replacement of nerve cords by nerve nets

  4. Dominance of the ventral pair of nerve cords

Show answer
Correct Option: C
Explanation:

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.

So, the correct answer is 'Replacement of nerve cords by nerve nets'.