Tag: characteristics of vertebrates

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Multiple choice biology diversity in living world characteristics of vertebrates classification of vertebrata classifications of chordata

Lamprey (Petromyzon) belongs to

  1. Chondrichthyes

  2. Osteichythes

  3. Agnatha

  4. Amphibia
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
A. Class Chondrichthyes comes under the superclass Pisces. Most fishes are marine and a few live in the tropical rivers.
B. Class Osteichthyes comes under the superclass Pisces and includes lungfishes, lobbed finned fishes and ray-finned fishes.
C. Agnatha is a paraphyletic superclass of jawless fish and includes two class, Cyclostomata, and an extinct class Ostracodermi.
D. Class Amphibia comprises the animals that inhabit both land and water.
Lamprey (Petromyzon) belongs to class Cyclostomata under superclass Agnatha.
So, the correct answer is 'Agnatha'.
Multiple choice biology diversity in living world characteristics of vertebrates classification of vertebrata classifications of chordata

Humans fall into which kingdom Animalia category?

  1. Hemichordata

  2. Mollusca

  3. Chordata

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

Humans are categorized as vertebrates in the phylum Chordata. The phylum Chordata contains all animals that possess, at some point during their lives, a hollow nerve cord, and a notochord, a flexible rod between the nerve cord and the digestive track. The phylum Chordata is an extremely diverse phylum and the one most recognizable to us. 

So, the correct answer is option C.

Multiple choice biology diversity in living world characteristics of vertebrates classification of vertebrata classifications of chordata

Pancreas is absent in

  1. Amphibia

  2. Osteichthyes

  3. Chondrichthyes

  4. Cyclostomata
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
A. Amphibians are the cold-blooded, freshwater vertebrates which can live both on land and in water.
B. Osteichthyes is the class of bony fishes which include lungfishes, ray-finned fishes and lobe-finned fishes.
C. Chondrichthyes is a class of Cartilaginous fishes which include sharks, rays and Chimaeras.
D. Cyclostomata is a class of round mouthed fishes under the superclass Agnatha which is known as Jawless vertebrates. The digestive system of Cyclostomata lacks stomach and pancreas.
So, the correct answer is 'Cyclostomata'.