Tag: animal diversity - ii (phylum: chordata)

Questions Related to animal diversity - ii (phylum: chordata)

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

Show answer
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

Show answer
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.

The 'birds' taxonomically represent a 

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

  1. family

  2. order

  3. class

  4. phylum

Show answer
Correct Option: C
Explanation:
Birds or Aves is the taxonomic class all flying chordates with four-chambered heart and feathers on their body are placed in.
So, the correct answer is 'class'.

Choose the correct answers from the alternatives given.
Which of the following is a true statement?

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

  1. In all mammals, offspring develop within the female.

  2. All mammals have hair and mammary glands.

  3. All mammals are land-dwelling forms.

  4. All of the above.

Show answer
Correct Option: B
Explanation:

Unlike other vertebrates, mammals nurse their young with milk produced by mammary glands. Though they're present in both males and females, in most mammal species mammary glands only fully develop in the females, hence the presence of smaller nipples on males (including male humans) also all mammals have hair at some point in their life. Not all mammals are land dwelling (dolphins)

So, the correct option is, 'all mammals have hair and mammary glands'.

Which of the following is an egg-laying mammal?

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

  1. Kangaroo

  2. Whale

  3. Bat

  4. Platypus

Show answer
Correct Option: D
Explanation:

Duck-billed platypus are egg-laying organisms. They are placed under the group of mammals because they possess skin with hair which provides protection and sweat gland which helps in the regulation of the body temperature and ionic balance. They possess milk-producing mammary glands which produce milk for the nourishment of the newborn. They show presence of seven cervical vertebrae and 12 pairs of cranial nerves like all other mammals. 

Thus, the correct answer is option D.