Biology · Science General

Diversity in Living Organisms

3,323 Questions

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 inferences from the text reading comprehension english

The question in this section are based on the reasoning contained in brief statements or passages For some question ,more than one of the choices could conceivably answer ; that is , the response that most accurately and completely that are by common sense standards implausible superfluous or incompatible with the passage.

Science columnist : it is clear why human have so many diseases in common with cats. Many human diseases are genetically based , and mammals expect nonhuman primates Each of the genes identified so far in cats has an exact counterpart in humans.
Which one of the following, if true, most weakens the science columnist 's explanation for the claim that humans have so many disease in common with cats?

  1. Cats have build up resistance to many of the diseases they have in common with humans.

  2. Most disease that human have in common with cats have no genetic basis.

  3. Cats have more disease in common with nonhuman primates than with humans.

  4. Many of the diseases human have in common with cats are mild and are rarely diagnosed.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Option (b) weakened because it states that the diereses  that human and cats have in common are not genetic in nature . Thus, it negates the science columnist's reasoning of humans and cats having similar diseases because of their genetic similarity. 

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

In taxonomic hierarchy, Cats are placed under the Genus.

  1. Felis

  2. Panthera

  3. Canis

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Cats are placed under the kingdom Animalia, and phylum Chordata, the class Mammalia, and order Carnivora. Cats do belongs to Felidae family and are classified with the genus Felis. So, the correct answer is (A).

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

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.

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.