Tag: number and shape of cells

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Multiple choice biology diversity in living things and their classification oviparous and viviparous number and shape of cells unicellular and multicellular organisms

Differentiate between vertebrates and invertebrates.

  1. (i) Vertebrates: (a) Notochord is present, (b) True internal skeleton present.

    (ii) Invertebrates:(a) Notochord is absent, (b) No true internal skeleton present.

  2. (i) Vertebrates: (a) Notochord is absent, (b) No true internal skeleton present.

    (ii) Invertebrates: (a) Notochord is present, (b) True internal skeleton present.

  3. (i) Vertebrates: (a) Nervechord is present, (b) True internal skeleton present.

    (ii) Invertebrates:(a) Notochord is absent, (b) No true internal skeleton present.

  4. (i) Vertebrates: (a) Nervechord is present, (b) True internal skeleton present.

    (ii) Invertebrates:(a) Notochord is absent, (b) True internal skeleton present.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
  • Vertebrates have a backbone with a spinal cord, whereas invertebrates do not.
  • The diversity is exceptionally high among the invertebrates compared to vertebrates.
  • Vertebrates are always bilaterally symmetrical, while invertebrates could show either bilateral or radial symmetry.
  • Vertebrates are usually large-bodied and move fast compared to invertebrates.
  • Vertebrates have a closed blood system, a well-developed brain, either gills or lungs for respiration, and a complex and sophisticated nervous system, whereas those are primitive in invertebrates. Therefore, it concerns that vertebrates have many specializations to extract the best out of the environment compared to invertebrates.
  • Despite all these changes, someone could draw a point that invertebrates are more adaptive due to their simplicity, whereas vertebrates do not have good adaptability in comparison because of the specialization. However, I would like to quote a popular quote to finish that in evolution specialization paralyzes and ultra specialization kills the viability of taxons.
Multiple choice biology animal world oviparous and viviparous number and shape of cells unicellular and multicellular organisms diversity and classification in animals adaptations in animals

Which one is not an oviparous animal?

  1. Human

  2. Crow

  3. Hen

  4. Crocodile
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

  • Animals that lay eggs to produce their offspring are known as oviparous animals
  • Birds, reptiles and amphibians are examples of oviparous animals.
  • Mammals (including human beings) are an example of viviparous animals as they produce offspring by the development of embryo inside their body, eventually leading to live birth.
So, the correct option is 'Human'.

Multiple choice biology animal world oviparous and viviparous number and shape of cells unicellular and multicellular organisms diversity and classification in animals adaptations in animals

Animals who give birth to young ones are 

  1. Oviparous

  2. Viviparous

  3. Ovoviviparous

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Animals giving birth to young ones are called viviparous animals. The egg of these animals typically contains less of yolk insufficient to support the development of the zygote into an embryo. Hence, development proceeds inside the body of the female animal and the fully developed embryo is delivered. Oviparous animals lay an egg. Their egg typically has more amount of yolk and can support the development of the zygote into an embryo. Ovovivipary is an in-between scenario in which eggs are retained till embryo is developed and is then delivered.

So, the correct answer is option B.

Multiple choice biology animal world oviparous and viviparous number and shape of cells unicellular and multicellular organisms diversity and classification in animals adaptations in animals

Birds are considered oviparous

  1. They are able to fly

  2. The forelimbs are modified into wings

  3. They lay eggs

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

Ovipary is the phenomenon in which an adult organisms reproduces and lays eggs which later hatch and give rise to young ones.

Since birds lay eggs they are known as oviparous.
Flight or wing modifications are not related to this phenomenon.
So the correct answer is 'They lay eggs'.

Multiple choice biology animal world oviparous and viviparous number and shape of cells unicellular and multicellular organisms diversity and classification in animals adaptations in animals

Birds and snakes are oviparous animals.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Oviparous are the animals which lay eggs. Snakes belong to class Reptilia and birds belongs to class Aves. They lay eggs. The eggs hatch by the warmth of the body. The yolk of the egg provides nutrition to the developing embryo.
So, the correct answer is option A.
Multiple choice biology animal world oviparous and viviparous number and shape of cells unicellular and multicellular organisms diversity and classification in animals adaptations in animals

Calf grows

  1. Inside the cow's body

  2. Outside the cow's body

  3. Inside the kangaroo's body

  4. Outside the kangaroo's body
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Cow is a placental mammal. Once it gives birth to a calf it grows outside the cow's body.

Young one of Kangaroo is known as Joey.
So the correct answer is 'Outside the cow's body'. 

Multiple choice biology animal world oviparous and viviparous number and shape of cells unicellular and multicellular organisms diversity and classification in animals adaptations in animals

Viviparity is found in

  1. Sharks

  2. Lizards

  3. Frogs

  4. Birds
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In viviparous animals, females give birth to young ones. The development of zygote takes place inside the female's body. Females deliver young ones and the chances of survival of offsprings are more. Mammals (except egg-laying mammals), like whale, shark, mouse, humans are examples of viviparous animals.

So, the correct answer is 'Sharks'.