Tag: classifications of chordata

Questions Related to classifications of chordata

Order Insectivora belongs to

zoology animal diversity - ii (phylum: chordata) aves and mammalia classifications of chordata aves

  1. Class mammalia

  2. Class insecta

  3. Phylum arthropoda

  4. Phylum echinodermata

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Correct Option: A
Explanation:

Order Insectivora belongs to the Class Mammalia as they are small, furry mammals. Like all other mammals, they give birth to young ones, have mammary glands and diaphragm.

General Characteristics of Insectivora are:
1. They are the Third largest group of Mammals.
2. They are very small in size.
3. Their skin is covered with fur or spines.
So the correct answer is 'Class Mammalia'. 

Bat is a member of order

zoology animal diversity - ii (phylum: chordata) aves and mammalia classifications of chordata aves

  1. Chiroptera

  2. Urodela

  3. Hymenoptera

  4. Lagomorpha

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Correct Option: A
Explanation:

Bats belong to the order Chiroptera.

General Characteristics of Chiroptera are:
1. Forelimbs modified to wing membranes.
2. Only mammals having ability to fly.
3. Elongated digits.
So, the correct answer is 'Chiroptera'. 

Cloaca is

zoology animal diversity - ii (phylum: chordata) aves and mammalia classifications of chordata aves

  1. Absent in mammals

  2. Found in prototheria

  3. Present in all fishes

  4. Both B and C

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Correct Option: B
Explanation:

Though cloaca is not present in all mammals but it is found in monotremes or Protherians.

All Protherians have cloaca.
In case of fishes only elasmobranch fishes have cloaca and not all fishes.

So the correct answer is 'Found in Prototheria'.

Cloaca is

zoology animal diversity - ii (phylum: chordata) aves and mammalia classifications of chordata aves

  1. Common aperture for digestive and urinary systems

  2. Common aperture for digestive, urinary and reproductive systems

  3. Common chamber in which reproductive, urinary and digestive tracts open

  4. Common chamber for digestive and urinary tracts

Show answer
Correct Option: C
Explanation:

Cloaca is a chamber or cavity that acts as an exit channel in organisms like reptiles, birds and amphibians.

It is a common chamber where reproductive, urinary and digestive tracts open.
So the correct answer is 'Common chamber in which reproductive, urinary and digestive tract open'

Identify the aquatic mammals from the following :
(i) Balaenoptera
(ii) Equus
(iii) Delphinus
(iv) Pteropus
(v) Felis

zoology animal diversity - ii (phylum: chordata) aves and mammalia classifications of chordata aves

  1. (i) and (iii) only

  2. (v) only

  3. (ii) and (iv) only

  4. (iv) and (v) only

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Correct Option: A

Humans belong to family

zoology animal diversity - ii (phylum: chordata) aves and mammalia classifications of chordata aves

  1. Hominidae

  2. Pongidae

  3. Hylobatidae

  4. Ramapithecus

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Correct Option: A
Explanation:

Humans belong to the Hominidae family.

Hominidae consists of Human, Gorilla, Chimpanzee and Orangutan.
General Characteristics of this family are:

1. Tails are absent.
2. Flattened nails.
3. Forearms are well developed.
So the correct answer is 'Hominidae'. 

Animals of class Mammalia have 

zoology animal diversity - ii (phylum: chordata) aves and mammalia classifications of chordata aves

  1. Seven cervical vertebrae

  2. Seven cranial nerves

  3. Single ventricular chamber

  4. Fourteen cervical vertebrae

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Correct Option: A
Explanation:

The vast majority of mammals have seven cervical vertebrae (bones in the neck), including bats, giraffes, whales, and humans.

So the correct option is A.

Which of the following is an oviparous mammal?

zoology animal diversity - ii (phylum: chordata) aves and mammalia classifications of chordata aves

  1. Balaenoptera

  2. Delphinus

  3. Pteropus

  4. Ornithorhynchus

Show answer
Correct Option: D
Explanation:

Mammals are viviparous, i.e. they give birth to young ones. But there are some exceptions. The monotremes like Echidna (Tachyglossidae) and Platypus (Ornithorhynchus) are oviparous mammals.

So, the correct option is 'Ornithorhynchus'.

Which one does not come under the same order as the other three ?

zoology animal diversity - ii (phylum: chordata) aves and mammalia classifications of chordata aves

  1. Rat

  2. Squirrel

  3. Porcupine

  4. Rabbit

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Correct Option: D
Explanation:

Rabbits belong to the order Lagomorpha.

Rat, Squirrel and Porcupine belong to the order Rodentia.
So the correct answer is 'Rabbits'. 

If the number of chromosomes in most body cells of a marnmal is 40, the cells in the seminiferous tubule will have

zoology animal diversity - ii (phylum: chordata) aves and mammalia classifications of chordata aves

  1. 40 chromosomes

  2. 20 chromosomes

  3. 10 chromosomes

  4. While some other will have 20

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Correct Option: D
Explanation:

Reduction division takes place during spermatogenesis. Spermatids and sperms will have haploid number of chromosomes.