Tag: diversity and classification in animals
Questions Related to diversity and classification in animals
Calf grows
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Inside the cow's body
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Outside the cow's body
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Inside the kangaroo's body
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Outside the kangaroo's body
Cow is a placental mammal. Once it gives birth to a calf it grows outside the cow's body.
Viviparity is found in
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Sharks
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Lizards
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Frogs
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Birds
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?
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Amoeba
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Paramoecium
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Human beings
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None of these
Cells vary in shape from 0.1 mm to 1 m.
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True
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False
Which one from the following is an example of multicellular organism?
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Chlamydomonas
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Bacteria
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Snake
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Amoeba
Efficient large-sized cells are
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Elongated
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Elongated or branched
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With large surface area
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Having microvilli
Which of following organisms can be seen only under the microscope?
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Unicellular
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Multicellular
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Vertebrates
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All of the above
- 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?
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Squamous epithelial cells
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Mature leucocyte of man
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Mature erythrocyte of frog
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Mature erythrocyte of man
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Osteocyte in man
- 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'.
Forthe formation of diploid cells from haploid cells, colchicine is used to
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Stop the spindle fibres formation
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Replicate DNA twicely in one cell cycle
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Stop the formation of centromere
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Stop the mitotic division
Growth at cellular level, is principally a consequence of increase in the amount of
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Protoplasm
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DNA
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Cell wall
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Cell organelles
Protoplasm comprises of cytoplasm, nucleus and other cell organelles. Growth at cellular level includes increase in size of nucleus and other cell organelles. The growth at cellular level is a result of increase in amount of protoplasm.