Tag: zoology

Quizzes (289) Questions (5869)

Questions Related to zoology

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

Balanoglossus is now classified in

  1. Chordata

  2. Urochordata

  3. Cephalochordata

  4. Non-chordata
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Balanoglossus was earlier placed in the group of the Hemichordates. But now like the other doubtful Hemichordates, such as Cephalodiscus and Rhabdopleura, Balanoglossus are now classified under non-chordates after echinoderms. It is because their notochord is doubtful. They have a short notochord which is confined to proboscis and non homologous with that of chordates.

Thus, the correct answer is option D.

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

Which of the following animal is called as typical chordate?

  1. Hermania

  2. Amphioxus

  3. Balanoglossus

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

Amphioxus also called as lancelets or cephalochordates form one of the three chordate subphyla. Amphioxus possess typical chordate characters, such as a dorsal hollow neural tube and notochord, a ventral gut and a perforated pharynx with gill slits, segmented axial muscles and gonads, a post-anal tail, a pronephric kidney. Hence, option B is correct.

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

Hatschek's nephridium is present in 

  1. Herdmania

  2. Amphioxus

  3. Both of the above

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

The unpaired 'Hatscheck's nephridium' is the largest and most anterior of the nephridia in the body of the Branchiostoma. It is a single tubule which lies on the left side of the notochord running parallel to the left anterior aorta. It stretches from the anterior vestibule to a point immediately posterior to the velum where it opens into the endodermal pharynx. 

So, the correct answer is option B.

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

Stomorchord (buccal diverticulum) is present in 

  1. Amphioxus

  2. Herdmania

  3. Balanoglossus

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

Hemichordata closely relates the Chordates. It contains marine deuterostome animals. They have a tubular structure known as stomochords. Stomochords arise in embryonic development as an out-pocketing from the roof of the embryonic gut anterior to the pharynx. In adults, they extend dorsally from the pharynx into the proboscis and serve to communicate with the oral cavity. Their walls are composed primarily of epithelial cells, but ciliated and glandular cells are also present.Balanoglossus belongs to the Hemichordata phylum. So, it has buccal diverticulum.

So, the correct answer is option C.

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

In which of the following notochord is absent?

  1. Adult Herdmania and adult Balanoglossus

  2. Adult Herdmania and adult Brachiostoma

  3. Larva of Herdmania and Brachiostoma

  4. Larva of Herdmania and Balanoglossus
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Balanoglossus belongs to subphylum Hemichordata, which have a short notochord present in anterior part of the body but it is only present in the larval stage.

Herdmania belongs to subphylum Urochordata, which have a notochord present in the tail but notochord is present only in larval stages.
Therefore notochord is absent in adult Herdmania and adult Balanoglossus. 
So, the correct answer is option A.

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

The correct classification of Balanoglossus is

  1. Chordata $\rightarrow$ Vretebrata $\rightarrow$ Enteroneusta
  2. Chordata $\rightarrow$ Vretebrata $\rightarrow$ Pterobranchia
  3. Chordata $\rightarrow$ Hemichordata $\rightarrow$ Pterobranchia
  4. Chordata $\rightarrow$ Hemichordata $\rightarrow$ Enteropneusta
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Balanoglossus is an ocean-dwelling acorn worm, it is an "evolutionary link" between invertebrates and vertebrates. It belongs to chordates, phylum Hemichordata and order Enteropneusta.

So, the correct answer is option D.

Multiple choice zoology insects and human welfare bee keeping apiculture apiculture, sericulture and fisheries

Which of the following plays a role in indigenous system of medicine?

  1. Plant breeding

  2. Fisheries

  3. Apiculture

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

Honey is a product of Apiculture which is used in various medicinal preparations due to its antibacterial properties, it is used as a base or solvent in many medicinal preparations.It is also used in cosmetic industry. Example- cough syrups

So, the  correct answer is 'Apiculture'