Tag: unicellular and multicellular organisms

Questions Related to unicellular and multicellular organisms

Animals which gives birth to the young one is called as invertebrates.

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

  1. True

  2. False

Show answer
Correct Option: B
Explanation:

Animals which give birth to young ones are known as mammals which are vertebrates.

So the correct answer is 'False'. 

Birds and snakes are oviparous animals.

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

  1. True

  2. False

Show answer
Correct Option: A
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.

Calf grows

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

  1. Inside the cow's body

  2. Outside the cow's body

  3. Inside the kangaroo's body

  4. Outside the kangaroo's body

Show answer
Correct Option: A
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'. 

Viviparity is found in

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

  1. Sharks

  2. Lizards

  3. Frogs

  4. Birds

Show answer
Correct Option: A
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'.

Which of these is a multicellular organism?

botany living world of animals number and shape of cells unicellular and multicellular organisms diversity and classification in animals

  1. Amoeba

  2. Paramoecium

  3. Human beings

  4. None of these

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Correct Option: C
Explanation:
A. Amoeba is a single-celled eukaryotic organism that moves by the means of pseudopodia.
B. Paramoecium is a unicellular eukaryotic organism. It is a ciliate.
C. Human beings are the multicellular primates, scientifically known as Homo sapiens.
So, the correct answer is 'Human beings'.

Cells vary in shape from 0.1 mm to 1 m.

botany living world of animals number and shape of cells unicellular and multicellular organisms diversity and classification in animals

  1. True

  2. False

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Correct Option: A

Which one from the following is an example of multicellular organism?

botany living world of animals number and shape of cells unicellular and multicellular organisms diversity and classification in animals

  1. Chlamydomonas

  2. Bacteria

  3. Snake

  4. Amoeba

Show answer
Correct Option: C
Explanation:
The cell is the structural unit of life. Unicellular organisms are made up of one cell that performs all the functions e.g., bacteria, amoeba, Chlamydomonas. Whereas, multicellular organisms are made up of numbers of cells and a differnt group of cells perform a different function to maintain life. Snake is an example of the multicellular eukaryotic organism.

Efficient large-sized cells are

botany living world of animals number and shape of cells unicellular and multicellular organisms diversity and classification in animals cell parameters

  1. Elongated

  2. Elongated or branched

  3. With large surface area

  4. Having microvilli

Show answer
Correct Option: A
Explanation:

  • Generally, cells are small so they can have an efficient surface area to volume ratio. Cells are so small so they can diffuse faster and all their processes will be a lot faster because of the smaller size of the cell.
  • For the large sized cells to become Efficient the cells must be elongated in order to have an efficient surface area to volume ratio.
  • Hence efficient large-sized cells are elongated.
  • So, the correct answer is 'Elongated'.

    • Which of following organisms can be seen only under the microscope?

    botany living world of animals number and shape of cells unicellular and multicellular organisms diversity and classification in animals the cell structure cytoplasm cell parameters

    1. Unicellular

    2. Multicellular

    3. Vertebrates

    4. All of the above

    Show answer
    Correct Option: A
    Explanation:
    • Most unicellular organisms are of microscopic size and are thus classified as microorganisms, for example, Phytoplankton and protozoa range from about 0.001 mm to about 0.25 mm.
    • Most of the multicellular organisms and vertebrates are visible to the naked eye, which means that it is possible to view them without using the microscope.
      So, option A is the correct answer.

    Which one is enucleated?

    botany cell theory, cell specialization, and cell replacement number and shape of cells unicellular and multicellular organisms diversity and classification in animals

    1. Squamous epithelial cells

    2. Mature leucocyte of man

    3. Mature erythrocyte of frog

    4. Mature erythrocyte of man

    5. Osteocyte in man

    Show answer
    Correct Option: D
    Explanation:

    • Enucleation is the phenomenon in which the nucleus is removed. Enucleation occurs roughly when the cell has reached maturity.
    • Red blood cells or Erythrocytes are initially produced in the bone marrow with a nucleus. They then undergo a process known as enucleation.
    • Enucleation allows the red blood cell to contain more hemoglobin and therefore, carry more oxygen molecules. It also allows the cell to have its distinctive bi-concave shape which aids diffusion. This shape would not be possible if the cell had a nucleus in the way. Hence mature erythrocyte of man is enucleated.
    • So, the correct answer is 'Mature erythrocyte of man'.