Tag: animal classification and its benefits

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

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

  1. Echinodermata

  2. Mollusca

  3. Porifera

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
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. 

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

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

  1. Arthropoda

  2. Echinodermata

  3. Mollusca

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
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'.

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

Mostly animals fall in the category of

  1. Heterotrophs

  2. Autotrophs

  3. Decomposers

  4. Primary consumers
Reveal answer Fill a bubble to check yourself
A Correct answer
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.'

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

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.

  1. Both A and B

  2. Only A

  3. Only B

  4. Only C
Reveal answer Fill a bubble to check yourself
A Correct answer
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'.

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

An animals phylum is defined on the basis of 

  1. Number of germ layers

  2. the uniqueness of its body plan

  3. type of body symmetry

  4. All the above
Reveal answer Fill a bubble to check yourself
D Correct answer
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'
Multiple choice biology the living world: adaptations and classification animal classification and its benefits criteria for new system of classification five kingdoms of living organisms

Animals of class ciliata

  1. Have two nuclei

  2. Are autotrophs

  3. Reproduce sexually

  4. Possess cilia
Reveal answer Fill a bubble to check yourself
A,D Correct answer
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'.
Multiple choice biology biodiversity and classification animal classification and its benefits criteria for new system of classification five kingdoms of living organisms

Organisms classified under Kingdom Animalia.

  1. Are not essentially heterotrophs

  2. Definitely lack cell wall

  3. Always show presence of nervous system

  4. May not show division o labour
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Kingdom Animalia includes multicellular, eukaryotic organisms that are heterotrophic and characteristically lack a rigid cell wall. Other options fail because animals are strictly heterotrophic, may have simple body plans without complex nervous systems or specialized division of labor in very primitive forms.