Tag: biology

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Questions Related to biology

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

........... is a living fossil.

  1. Drepanaspis

  2. Lamprey

  3. Cephalaspis

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

Petromyzen or Lamprey is a living fossil. The sea lamprey lacks bony teeth and jaws. It has an oral armament of conical teeth made of keratin. The lamprey even has teeth on its tongue. The oral apparatus of the adult lamprey is a sucking disk lined with whorls of over 100 of these teeth. 

So, the correct answer is option B.

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

Which among the following are known as false fishes?

  1. Pisces

  2. Cyclostomata

  3. Ostracodermi

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

Cyclostomata is a group of chordates that comprises the living jawless fishes - the lampreys and hagfishes. These fishes are a parasite as well as scavengers. The body is long, then tubular and tail is flat. They are also known as false fish.

So, the correct answer is option B.

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

Circular and suctorial mouth is present in

  1. Labeo

  2. Petromyzon

  3. Scolidon

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

Petromyzon (lampreys) are all carnivorous and are true predators. The method of attack is very peculiar. It attack fishes, turtles etc and it attach themselves by suctorial mouth which is circular in shape. Mouth acts a sucker, it rasps the flesh of the prey with its tongue. Teeth which are situated around the mouth sink into the flesh of the prey and serve it to hold properly. 

So, the correct answer is option B.

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

Kingdom Animalia is also known as

  1. Metazoa

  2. Protozoa

  3. Both A and B

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

Metazoa is the term given to the fully developed complex organism having tissue level organization. Kingdom Animalia is considered as metazoa. All the members of this kingdom are multicellular, eukaryotes. They are heterotrophs, they depend on other organisms directly or indirectly for food. Most of the organisms are motile which means they can move independently and spontaneously. 

So, the correct answer is option A.

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

Vertebrata consist of which classes from the following?

  1. Bony fish

  2. Amphibians

  3. Reptiles

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

Vertebrata is the most important part of chordate and is distinguished by a backbone (made either of bone or cartilage) having bones known as vertebrae and a skull enclosing a brain. The nervous system is entirely protected by these structures and also maintains the shape of the body.

The subphylum vertebrata is divided into seven classes: jawless fish, cartilaginous fish, bony fish, amphibians, reptiles, birds and mammals. 
So, the correct answer is option D.

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

Which of the following is the most important part of chordate?

  1. Hermichordate

  2. Vertebrata

  3. Mollusca

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

Vertebrata is the most important part of chordate and is distinguished by a backbone (made either of bone or cartilage) having bones known as vertebrae and a skull enclosing a brain. The nervous system is entirely protected by these structures and also maintains the shape of the body.

So, the correct answer is option B.

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

Petromyzon belongs to class

  1. Osteichthyes

  2. Chondrichthyes

  3. Cyclostomata

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

Which is true?

  1. All living members of class cyclostomata are parasites on some fishes

  2. There are about 2000 species in the class osteichthyes

  3. Ciona belongs to subphylum cephalo chordata

  4. Arthropods are diploblastic animals

  5. Ascaris lumbricoides is a flatworm
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Cyclostomes (like lampreys) are jawless vertebrates that are often ectoparasites on other fishes. Option C is wrong because Ciona is a Urochordate, not a Cephalochordate.