Tag: number and shape of cells

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Multiple choice botany caskets of life the cell structure cytoplasm unicellular and multicellular organisms number and shape of cells diversity and classification in animals cell parameters

Hybridoma cells are

  1. nervous cells of frog

  2. hybrid cells resulting from myeloma cells

  3. only cells having oncogenes

  4. product of spore formation in bacteria.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Hybridoma cells are created by fusing a B-lymphocyte (antibody-producing cell) with a myeloma cell (cancerous cell). This fusion allows the resulting cells to produce specific antibodies indefinitely.

Multiple choice botany living world of animals oviparous and viviparous number and shape of cells unicellular and multicellular organisms diversity and classification in animals

The organism made up of only a single cell is known as 

  1. Unicellular

  2. Acellular

  3. Multicellular

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

The cell is the structural unit of life. Unicellular organisms are made up of one cell that performs all the functions and thus, called as a single-celled organism.

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

................... possess notochord, ............... do not possess notochord.

  1. Vertebrates, invertebrates

  2. Invertebrates, vertebrates

  3. Notochords, chordates

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

The animals who posses a proper notochord are known as vertebrates whereas the organisms who do not have a proper notochord are known as invertebrates.

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

.............. are those animals which have no backbone.

  1. Invertebrates

  2. Vertebrates

  3. Mammals

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

The vertebral column is a supportive structure derived from the notochord. It is more commonly called the backbone or the spine. Animals that do not possess or develop a vertebral column or backbone are commonly called invertebrates. They include crabs, snails, lobsters, octopuses, sea urchins, worms, etc.

So, the correct answer is 'Invertebrates'.

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

Human beings are invertebrate.

  1. True

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

Vertebrates are the animals that possess a dorsal hollow nerve cord, pharyngeal gill slits, and a notochord at some stage of their lives. Human beings are mammals that possess all three of these characteristics and are hence vertebrates.

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

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).