Tag: classifications of chordata

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Questions Related to classifications of chordata

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

Order Insectivora belongs to

  1. Class mammalia

  2. Class insecta

  3. Phylum arthropoda

  4. Phylum echinodermata
Reveal answer Fill a bubble to check yourself
A Correct answer
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'. 

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

Cloaca is

  1. Absent in mammals

  2. Found in prototheria

  3. Present in all fishes

  4. Both B and C
Reveal answer Fill a bubble to check yourself
B Correct answer
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'.

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

Cloaca is

  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
Reveal answer Fill a bubble to check yourself
C Correct answer
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'

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

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

  1. (i) and (iii) only

  2. (v) only

  3. (ii) and (iv) only

  4. (iv) and (v) only
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Balaenoptera (blue whale) and Delphinus (dolphin) are aquatic mammals. Equus (horse), Pteropus (bat), and Felis (cat) are terrestrial.

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

Humans belong to family

  1. Hominidae

  2. Pongidae

  3. Hylobatidae

  4. Ramapithecus
Reveal answer Fill a bubble to check yourself
A Correct answer
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'. 

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

Which of the following is an oviparous mammal?

  1. Balaenoptera

  2. Delphinus

  3. Pteropus

  4. Ornithorhynchus
Reveal answer Fill a bubble to check yourself
D Correct answer
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'.

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

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

  1. 40 chromosomes

  2. 20 chromosomes

  3. 10 chromosomes

  4. While some other will have 20
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

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