Tag: criteria for new system of classification

Questions Related to criteria for new system of classification

The animals having soft bodies with shell as a covering belongs to 

biology the living world: adaptations and classification animal classification and its benefits criteria for new system of classification five kingdoms of living organisms

  1. Echinodermata

  2. Mollusca

  3. Porifera

  4. None of the above

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Correct Option: B
Explanation:

The molluscs have a calcareous shell covering the body. However, a soft and spongy layer of skin is present over the visceral hump of molluscs, forming the mantle. Echinoderms do not have a soft body. They have calcareous endoskeleton making it spiny bodies. Poriferans have pores all over the body. Therefore, they are also not soft bodied. Moreover, sponges also bear spicules or spongin fibres. 

Which of the following phylum of the animal is characterized by jointed legs?

biology the living world: adaptations and classification animal classification and its benefits criteria for new system of classification five kingdoms of living organisms

  1. Arthropoda

  2. Echinodermata

  3. Mollusca

  4. None of the above

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Correct Option: A
Explanation:

Jointed legs is the exclusive characteristic of the phylum Arthropoda.

Molluscs and Echinodermata do not have any differentiated legs.
Some common characteristics of Arthropods are:
1. Exoskeleton.
2. Segmented bodies.
3. Jointed appendages.
So the correct answer is 'Arthropoda'.

Most primitive mammal is 

biology the living world: adaptations and classification animal classification and its benefits criteria for new system of classification five kingdoms of living organisms

  1. BAT

  2. Rat

  3. Platypus

  4. Kanharoo

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Correct Option: C
Explanation:

There are three living genera of primitive mammals from Australia classified as Monotremes-The Duck billed platypus and 2 genera of Echidna.

So the correct answer is platypus.

Which of the following is not a true fish ?

biology the living world: adaptations and classification animal classification and its benefits criteria for new system of classification five kingdoms of living organisms

  1. Silverfish

  2. Sea horse

  3. Flying fish

  4. Eel

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Correct Option: A
Explanation:

Silverfish is an insect.

So the correct answer is silver fish.

Mostly animals fall in the category of

biology the living world: adaptations and classification animal classification and its benefits criteria for new system of classification five kingdoms of living organisms

  1. Heterotrophs

  2. Autotrophs

  3. Decomposers

  4. Primary consumers

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Correct Option: A
Explanation:

A heterotroph is an organism that cannot produce its own food and rely on others for its food requirement. Most animals fall in the category of heterotrophs. They are not able to synthesize their own food. They usually eat autotrophs (plants) to obtain the energy. The types of heterotrophs include herbivores, those who eat plants; carnivores, those who eat other animals; omnivores, those who eat both plants and animals. 

Thus, the correct answer is 'Heterotrophs.'

Which of the following statement is correct?


A. Annelids have special organs of excretion called nephridia.
B. Cockroach belongs to class Arthropoda.
C. Crocodiles belong to the class Amphibia.

biology biodiversity and classification animal classification and its benefits criteria for new system of classification five kingdoms of living organisms

  1. Both A and B

  2. Only A

  3. Only B

  4. Only C

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Correct Option: A
Explanation:

In earthworms, members of the phylum Annelida, the excretory system consists of structural units called nephridia. The nephridium is an invertebrate organ which occurs in pairs and performs a function similar to the vertebrate kidney. Nephridia remove metabolic wastes from an animal's body. Cockroach belongs to class Arthropoda because it has jointed appendages and the hard exoskeleton. Crocodiles are reptiles, not amphibians because they lay their eggs on the land, not in the water.

So, the correct answer is 'Both A and B'.

An animals phylum is defined on the basis of 

biology the living world: adaptations and classification animal classification and its benefits criteria for new system of classification five kingdoms of living organisms

  1. Number of germ layers

  2. the uniqueness of its body plan

  3.  type of body symmetry

  4. All the above

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Correct Option: D
Explanation:
An animal phylum is defined on the basis of 6 parameters of which three are - number of germ layers - diploblastic or triploblastic. Type of body plan i.e blind sac pattern, tube within tube pattern and body symmetry - asymmetry, radial symmetry and bilateral symmetry
So, the correct answer is 'All the above'

Animals of class ciliata

biology the living world: adaptations and classification animal classification and its benefits criteria for new system of classification five kingdoms of living organisms

  1. Have two nuclei

  2. Are autotrophs

  3. Reproduce sexually

  4. Possess cilia

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Correct Option: A,D
Explanation:
Animals of class ciliata are characterised by the presence of hair-like organelles called cilia. They have two types of nuclei: a tiny, diploid micronucleus (generative nucleus) which carries the germline of the cell, and a large, polyploid macronucleus (vegetative nucleus) which takes care of general cell regulation, expressing the phenotype of the organism. Most ciliates are heterotrophs. Ciliates reproduce asexually, by various kinds of fission.
So, the correct options are 'Have two nuclei and possess cilia'.

Which of the following kingdom exhibit heterotrophic : holozoric and saprophytic mode of nutrition only :-

biology biodiversity and classification animal classification and its benefits criteria for new system of classification five kingdoms of living organisms

  1. Monera

  2. Protista

  3. Fungi

  4. Animalia

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Correct Option: A

Organisms classified under Kingdom Animalia.

biology biodiversity and classification animal classification and its benefits criteria for new system of classification five kingdoms of living organisms

  1. Are not essentially heterotrophs

  2. Definitely lack cell wall

  3. Always show presence of nervous system

  4. May not show division o labour

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Correct Option: A