Tag: animal diversity - ii (phylum: chordata)

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

In which one of the following, the genus name, its two characters and its class/phylum are correctly matched?

Genus Name Two characters Class/Phylum
(a) Ascaris (i)(ii) Body segmentedMales and females distinct Annelida
(b) Salamandra (i)(ii) A tympanum cover middle ear,Fertilisation is internal Amphibia
(c) Pteropus (i)(ii) Skin possesses hairOviparous Mammalia
(d) Aurelia (i)(ii) CnidoblastOrgan level of organisation Coelenterata
zoology animal diversity - ii (phylum: chordata) aves and mammalia classifications of chordata aves

  1. (a)

  2. (b)

  3. (c)

  4. (d)

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Correct Option: B
Explanation:

Salamandra belonging to the Class Amphibia has a tympanum that covers middle ear and in it fertilisation is internal. Ascaris has an unsegmented body and it belongs to the Phylum Aschelminthes. Pteropus is viviparous. Aurelia has a tissue level of organisation.

So the correct option is B.

Which one of the following sets of animals share a four chambered heart?

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

  1. Amphibian, Reptiles, Birds

  2. Crocodiles, Birds, Mammals

  3. Crocodiles, Lizards, Turtles

  4. Lizards, Mammals, Birds

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Correct Option: B
Explanation:

Amphibians have three-chambered heart, while reptiles have incomplete four-chambered heart (except crocodiles). Crocodiles, birds and mammals have complete, four-chambered hearts.

Guinea pigs used in medical research are

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

  1. Stocky and brown in colour

  2. Black swine

  3. Rodents

  4. Found In Asia only

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Correct Option: C
Explanation:

Rodents are gnawing mammal of an order that includes rats, mice, squirrels, hamsters, porcupines, and their relatives, distinguished by strong constantly growing incisors and no canine teeth. They constitute the largest order of mammals.

They have many biological similarities to humans, beyond the simple fact that they are mammals, which make them useful in many fields of research.
So the correct option is 'Rodents'

Animal development is limited to the period prior to birth hatching.

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

  1. True

  2. False

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Correct Option: B
Explanation:

Animal development are the processes that lead eventually to the formation of new animal from cells derived from one or more parent individuals. There are various post-embryonic development that takes place outside the body and are considered as animal development.

For frugivorous birds and mammals in the tropical forests of different continents, the slope is found to be  

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

  1. 0.6

  2. 1.3

  3. 1.15

  4. 1.7

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Correct Option: C
Explanation:

The slope of the line is much steeper if we analyse the species-area relationships among very large areas like the entire continents. 

What do porcupine quills, pangolin scales, lion's claws, goose feathers and yak hooves have in common?

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

  1. They are made of cellulose

  2. They are made of keratin

  3. They secrete a substance called ambergris

  4. None of this

Show answer
Correct Option: B
Explanation:
  • Keratin is a protein deposited in the epidermal cells which protect the epithelial cells from damage or stress.
  • It is an important structural material that makes up the hair, horns, claws, hooves, and nails etc.
  • So, the correct answer is 'They are made of keratin'.

Which one of the following is not a member of Eutheria?

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

  1. Gorilla

  2. Pangolin

  3. Mole

  4. Platypus

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Correct Option: D
Explanation:

The Eutheria clad consists of the Placental Mammals.

Gorilla, Pangolin, and Moles are all placental mammals and hence belong to Eutheria.
Platypus is a monotreme and belongs to Prototheria.
So the correct answer is 'Platypus'.

Choose the correct answers from the alternatives given.
Generally the breathing system in birds:

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

  1. is identical to the human breathing system

  2. is merely accelerated by the flight muscles

  3. resembles the positive pressure system of a frog

  4. requires a flow-through bronchi-lung so constant oxygen absorption can meet the high oxygen demand

Show answer
Correct Option: D
Explanation:

Unidirectional flow means that air moving through bird lungs is largely 'fresh' air & has a higher oxygen content.  So, in bird lungs, more oxygen is available to diffuse into the blood. 

So the correct answer is "requires a flow-through bronchi-lung so constant oxygen absorption can meet the high oxygen demand".

Choose the correct answers from the alternatives given.
The organ of nutrition used in fetal development in the most successful mammals is the:

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

  1. mammary gland

  2. pouch

  3. placenta

  4. marsupium

Show answer
Correct Option: C
Explanation:

Maternal nutrition plays a vital role in the growth and development of the fetus. During prenatal development, the fetal circulatory system is integrated with the placenta via the umbilical cord so that the fetus receives both oxygen and nutrients from the placenta. The placenta is an organ that develops in your uterus during pregnancy. This structure provides oxygen and nutrients to your growing baby and removes waste products from your baby's blood. The placenta attaches to the wall of your uterus, and your baby's umbilical cord arises from it.

So, the correct option is, 'Placenta'.

Scrotum developed in metatheria occurs

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

  1. On sides of penis

  2. Behind penis

  3. In front of penis

  4. None of the above

Show answer
Correct Option: C
Explanation:

Metatherians or marsupials are mammals mostly found in Central and South America and in Australia. They include animals like bilbies, wombat, and kangaroos et cetera. In contrast to placental mammals, their scrotum develops in front of the penis instead of behind it. 

So, the correct answer is 'In front of penis'.