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 zoology diversity in living world hemichordata phylum hemichordata chordates and hemichordates

Multicellular organisms with pores are called

  1. Protozoans

  2. Poriferans

  3. Arthropodans

  4. Aves
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Poriferans are commonly known as sponges. They are multicellular organisms with cellular level of organization. They are sessile and sedentary in nature. These have an exoskeleton made up of either spongin fibers or calcareous or siliceous spicules. The spicules form the skeleton of the body which provides protection. These spicules are  formed by sclerocyte cells present in the mesenchyme.

So, the correct answer is option B.

Multiple choice zoology diversity in living world hemichordata phylum hemichordata chordates and hemichordates

Which of the following is not a class of Hemichordata ?

  1. Pterobranchia

  2. Enteropneusta

  3. Planctosphaeroidea

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

Ascidiacea is a class of subphylum urochordata. Rest all  pterobranchiaEg. Rhabdopleura; Enteropneusta Eg. Acorn worms (Balanoglossus, Saccoglossus);planctosphaeroidea Eg. Planctosphaertara pelagica are class of Hemichordata.

Multiple choice zoology diversity in living world hemichordata phylum hemichordata chordates and hemichordates

Which group of protochordates contains Balanoglossus?

  1. Urochordata

  2. Cephalochordata

  3. Tunicata

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

A) Urochordata is a subphylum of the phylum Chordata and is included in protochordata. It does not include Balanoglossus.

B) Cephalochordata is a subphylum of the phylum Chordata and is included in protochordata It does not include Balanoglossus.
C) Tunicata is another word for Urochordata.
D) Hemichordata is a phylum included in protochordata and includes Balanoglossus.
Hence, the correct answer is 'Hemichordata'.

Multiple choice zoology diversity in living world hemichordata phylum hemichordata chordates and hemichordates

The body of Tongue Worm Balanoglossus is differentiated into

  1. Head, trunk and tail

  2. Trunk and tail

  3. Proboscis, collar and trunk

  4. Proboscis and collar
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Tongue worm Balanoglossus is a Hemichordate. The basic character of Hemichordates is a division of the body into proboscis, collar, and trunk.

A) Head and tail are not present in Balanoglossus.
B) The tail is absent in Balanoglossus.
C) The body of Balanoglossus is divided into proboscis, collar, and trunk.
D) Besides proboscis and collar, a trunk is also present.
So, the correct answer is 'Proboscis, collar, and trunk'.

Multiple choice zoology diversity in living world hemichordata phylum hemichordata chordates and hemichordates

In protochordates, the epidermis is

  1. Absent

  2. Multilayered

  3. A few layered

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

Protochordata is included in the phylum Chordata. They possess a single layer of epidermis consisting of long columnar cells. In some cases such as Balanoglossus, these cells are ciliated. The lower layer dermis is absent in Protochordates. Thus, the correct answer is 'Single layered'.

Multiple choice zoology diversity in living world hemichordata phylum hemichordata chordates and hemichordates

Acorn Worm is

  1. Doliolum

  2. Salpa

  3. Balanoglossus

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

Acorn worm is an any of the soft-bodied invertebrate belonging to phylum Hemichordata.

A) Doliolum is a urochordate.
B) Salpa is a urochordate.
C) Balanoglossus is another name for acorn worm.
D) Rhabdopleura is hemichordates but are not acorn worms.
So, the answer is ' Balanoglossus'.

Multiple choice zoology diversity in living world hemichordata phylum hemichordata chordates and hemichordates

Notochord like structure is present in hemichordates in the region

  1. Proboscis

  2. Collar

  3. Trunk

  4. Tail
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In Hemichordates, there is a false notochord known as a stomochord.

A) Proboscis region has the stomochord. Since the stomochord passes through the mouth it is known as 'stomo'chord. Stomo means mouth.
B) Collar region does not have the stomochord.
C) trunk region does not have the stomochord.
D) There is no tail region in the body of hemichordates.
So, the answer is 'proboscis'.

Multiple choice zoology diversity in living world hemichordata phylum hemichordata chordates and hemichordates

Who raised the status of hemichordates from subphylum to phylum?

  1. Linnaeus

  2. Lamarck

  3. Horst

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

Hemichordates were earlier a subphylum in the phylum Chordata. Later they were made into a separate phylum.

A) Linnaeus was a Swedish scientist who formulated the binomial nomenclature and made many other contributions to science. He did not separate Hemichordata from Chordata.
B) Lamarck did not separate Hemichordata from Chordata. But he is known for contributions like his idea of biological evolution.
C) Horst did not separate Hemichordata from Chordata. He was a German physicist.
D) Belfour separated Hemichordata from Chordata. He was a fellow of the Royal Society and was awarded their Royal Medal.
So, the answer is 'Belfour'.

Multiple choice zoology diversity in living world hemichordata phylum hemichordata chordates and hemichordates

Heart of hemichordates is

  1. Ventral

  2. Dorsal

  3. Lateral

  4. Absent
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A) Ventral heart if present, is in non-chordates except Hemichordates.

B) Dorsal heart is present in Hemichordates and chordates.
C) Lateral heart is not present in any animal.
D) Hemichordates have a well developed circulatory system with a heart.
So, the correct answer is 'dorsal'

Multiple choice zoology diversity in living world hemichordata phylum hemichordata chordates and hemichordates

Notochord like structure of hemichordates is

  1. Protochord

  2. Stomochord

  3. Pallium

  4. Glomerulus
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Hemichordates do not have a notochord but a false notochord.

A) Prochordata is an informal group of organisms which consists of hemichordates, cephalochordates and urochordates. It is not related to the notochord.
B) Stomochord is the notochord like structure in hemichordates.
C) Pallium is present in the cerebrum of the brain. It is not notochord like structure.
D) Glomerulus is located in kidneys. It is not notochord like structure.
So, the correct answer is 'Stomochord'