Tag: unicellular and multicellular organisms

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Questions Related to unicellular and multicellular organisms

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

Give the difference between vertebrates and invertebrates.

  1. Invertebrates do not have notochord vertebrates have notochord.

  2. The heart of invertebrates is present on dorsal side, while heart of vertebrate is present on ventral side.

  3. Invertebrates are less evolved animals where as chordata are highly evolved animals.

  4. All of the above.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
  • Invertebrates do not have a notochord, their heart is present on the dorsal side. They are less evolved animals, 
  • whereas vertebrates have notochords, their heart is on the ventral side and they are highly evolved animals.
Multiple choice biology diversity in living things and their classification oviparous and viviparous number and shape of cells unicellular and multicellular organisms

Vertebrates do not posses a notochordat any stage.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Vertebrates are animals that possess a notochord, a dorsal hollow nerve cord and pharyngeal gill slits at some stage of their lives. They might possess these characteristics during the initial stages of their lives and lose them later on or they might develop these features later in their lives.

So, the correct answer  is 'False'.

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

In non chordates, blood flow is _________ is ventral vessel and __________ in dorsal vessel.

  1. Backward, backward

  2. Backward, forward

  3. Forward, backward

  4. Forward, forward
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In most non-chordates (like earthworms), the blood flow in the ventral vessel is directed forward (anteriorly) and in the dorsal vessel, it is directed backward (posteriorly).

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'.