Biology · Science General

Diversity in Living Organisms

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The diversity in living organisms deals with the classification of life forms into various kingdoms and phyla. This topic covers specific traits of bacteria, animal body cavities, and structural adaptations for survival. These fundamentals are crucial for biology sections in medical entrance and state board exams.

Animal phyla characteristicsBacteria and flagellaBiological adaptationsKingdom Animalia classificationBody cavity typesExtinct organism subphylaJawless animals identification

Diversity in Living Organisms Questions

Multiple choice botany internal structure of root, stem and leaf internal structure of monocot stem internal structure of monocots internal structure of stem(dicot and monocot)

The stele present in Equisetum is

  1. Haplostele

  2. Actinostlele

  3. Plectostele

  4. Siphonostele
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

  1. Haplostele consist of smooth ore of xylem which is surrounded by a phloem ring.ex-Seleginella
  2. Actinostele consist of star shape xylem core with many radiating arms.ex-Lycopodium
  3. Plectostele consist of xylem core broken into a number of parallel plates.ex-Lycopodium clavatum
  4. Siphonostele is a protostele with central pith and considered to be the most advance stele.ex-Equisetum.
So the correct option is "Siphonostele".

Multiple choice expression of gene inherited changes biology

Prokaryotes can be distinguished from eukaryotes as they lack

  1. RNA

  2. Ribosomes

  3. Gene discontinuity

  4. Unique DNA sequences
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Prokaryotes lack split genes, meaning their coding sequences are continuous and do not contain introns. Eukaryotic genes are frequently interrupted by non-coding introns.

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 are known as pore bearers?

  1. Moullsca

  2. Porifera

  3. Echinodermata

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

Porifera are known as pore bearers because they have tiny sized pores all over their bodies.

Molluscs have smooth skins whereas Echinodermata have spiny skins.
These two phylums do not have any pores on their bodies.
Hence the correct answer is 'Porifera'.

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

Tapeworms belongs to 

  1. Porifera

  2. Mollusca

  3. Platyhelminthes

  4. Nematoda
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Tapeworm belongs to Platyhelminthes.

This is can be confirmed by seeing the general characteristics of Platyhelminthes:
1. They are dorsoventrally flattened.
2. Their bodies are bilaterally symmetrical.
3. They are acoelomate and soft 
4. They are tripblastic animals.
So the correct answer is 'Platyhelminthes'. 

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 with spiny skin belongs to 

  1. Porifera

  2. Annelida

  3. Echinodermata

  4. All of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Spiny skin is the specific characteristic of the phylum Echinodermata.

The term Echinodermata itself means Spiny skin.
Porifera on the other hand have porous skin and annelids have very smooth skin.
Some characteristics of Echinodermata are:
1. Spiny skin.
2. Radial symmetry 
3. Exclusively marine.
4. Triploblastic.
So the correct answer is 'Echinodermata'.

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

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

Multicellular eukaryotic consumers belong to kingdom

  1. Fungi

  2. Protista

  3. Plantae

  4. Animalia
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

In Animalia (kingdom of multicellular consumers), the members are eukaryotic, multicellular, heterotrophic consumers. They feed on other organism and thus called as consumers. They contain glycogen or fat as reserve food.

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

The kingdom Animalia includes which of the following peculiar characteristics?

  1. Chambered heart

  2. Oviparous and Viviparous

  3. Coelomate

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The organisms placed in the kingdom Animalia are multicellular, eukaryotic organisms which exhibit certain features. These organisms have a heart which is divided into different chambers. The contraction and relaxation of these chambers help in the circulation of the blood. The animals are oviparous which lay eggs and there are some animals which give birth to the young ones. These animals are coelomate as there is a gastrovascular cavity in the animals. 

Thus, the correct answer is option D. 

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

Kingdom Animalia are classified into

  1. Phylum Porifera

  2. Phylum Arthropoda

  3. Phylum Chordata

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Kingdom Animalia is classified into 36 phyla on the basis of similarity and dissimilarity. Phyla are further divided into the class.
Phylum Porifera belongs to the animal kingdom which has the cellular level of organization.
Phylum of the animal kingdom which has tissue level of organization are Arthropoda, Platyhelminthes, Nematoda, Cnidaria, Annelida, Echinodermata, Mollusca and Chordata.
Thus, the correct answer is option D.

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

An organisms lacks complete digestive tract is

I. Jellyfish
II. Mollusk
III. Earthworm

  1. I, II and III

  2. I only

  3. II only

  4. III only

  5. I and III only
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Jellyfish have an incomplete digestive system as the same orifice is used for both food intake and waste expulsion. Mollusk and earthworm have a complete digestive system with distinct openings for food intake and waste expulsion. 

Therefore, the correct answer is option B.