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

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

  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
Reveal answer Fill a bubble to check yourself
D Correct answer
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".

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

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

  1. mammary gland

  2. pouch

  3. placenta

  4. marsupium
Reveal answer Fill a bubble to check yourself
C Correct answer
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'.

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

Scrotum developed in metatheria occurs

  1. On sides of penis

  2. Behind penis

  3. In front of penis

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
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'.

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

Flightless aquatic birds belong to

  1. Ratitae

  2. Impennae

  3. Carinatae

  4. Odontognathae
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
The duper order impennae constitutes birds which are flightless, with paddles like wings or flippers.these birds have webbed feet and can swim well.they are adapted to aquatic life.impennae belongs to the subclass neornithes of the class aves.
Multiple choice zoology animal diversity - ii (phylum: chordata) aves and mammalia classifications of chordata aves

Choose the correct answers from the alternatives given.
How are salamanders different from snakes?

  1. Ancestors of snakes but not salamanders were tetrapods

  2. Salamanders reproduce on land but snakes do not

  3. Snakes but not salamanders lay a shelled egg

  4. Salamanders are carnivores, and snakes are herbivores
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Snakes have leathery, soft or hard eggs laid on land or maintained inside the body until hatching. Salamanders have soft eggs normally laid in water or in damp media.

So the correct answer is "Snakes but not salamanders lay a shelled egg".

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

Double uterus and double vagina are characteristic of.

  1. Prototheria

  2. Metatheria

  3. Chiroptera

  4. Cetacea
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Marsupials have two vagina and two uterus and before birth a birth canal forms between them. The ancestors of marsupials are part of a larger group called metatherians and they represent the clade originating from the last common ancestor of metatherians. So, the correct option is 'Metatheria'.

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

Pouched or marspium containing mammals are

  1. Prototheria

  2. Metatheria

  3. Eutheria

  4. Theria
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Metatherians are mammals that are also known as marsupials. Most of the marsupials are found in Central and South America and in Australia. They are called marsupials as they have a marsupium or pouch on their bodies. This group consists of animals like kangaroos, wombat, macropods, et cetera.

So, the correct answer is 'Metatheria'.

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

In which of the following groups contain oviparous mammals?

  1. Prototheria

  2. Metatheria

  3. Eutheria

  4. Theria
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
  • Oviparous animals are the egg-laying animals which show little or no embryonic development within the mother.
  • This type of reproductive method is common in most fish, amphibians, reptiles, birds and prototherians.
  • Prototherians are egg-laying mammals and feed their newborn like all other mammals.  
  • They lack nipples but the skin over their mammary glands secrete milk for their babies. 
  • They are called monotreme as they have only one opening for excretion and reproduction. 
  • So, the correct answer is 'Prototheria'.