Tag: structural organization in living organisms
Questions Related to structural organization in living organisms
The integral component of the nervous tissue is
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Axon
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Neuron
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Cyton
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None of the above
Cell body is known as
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Axon
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Cyton
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Neuron
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None of he above
The voluntary muscles are known as
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Striated muscles
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Cardiac muscles
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Unstriated muscles
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None of the above
Which of the following characteristics can be related to cardiac muscles?
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They are striated.
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They are involuntary muscles.
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They are less prone to fatigue.
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All of the above
The squamous epithelium is mainly involved in
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Protection
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Absorption
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Secretion
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None of these
Squamous epithelium is a type of epithelium tissue. The cells of this tissue are thin, flat and closely packed. These are found in cavities of mouth, oesophagus, alveoli and blood vessels. This tissue gives protection against mechanical injury and also blocks the entry of pathogens or germs.
Which of the following levels of structure encompasses all the other?
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Tissue
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Cell
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Organism
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Organ or organ system
Choose the correct answers from the alternatives given.
Which one of the following is not a characteristic of animals?
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Heterotrophic
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Diplontic life cycle
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Have contracting fibres
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Single cells or colonial
All animals are eukaryotic, multicellular organisms, and most animals have complex tissue structure with differentiated and specialized tissue. Animals are heterotrophs; they must consume living or dead organisms since they cannot synthesize their own food and can be carnivores, herbivores, omnivores, or parasites.
The bundle of axon is known as
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Nerve
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Cyton
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Axon
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None of these
Meristematic tissue occurs in
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Stems
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Roots
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All growing tips
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Both of the (A) and (B)
- Meristem is the region marked by the presence of active cell growth and the tissues present in meristem are termed as meristematic tissues.
- On the basis of their position in the plant body, meristems are grouped as apical, lateral or intercalary meristem.
- Stem has apical meristem in the shoot apex, intercalary meristem in nodes and lateral meristem in form of cambium in vascular bundles.
- Roots have apical meristem root apex and lateral meristem in form of cambium in vascular bundles. Shoot and root tips are the growing tips of a plant. Due to presence of root cap in terminal position, root apical meristem is subterminal in position thus, not all the growing tips have meristem.
Meristems are
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Permanent cells
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Dividing cells
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Mechanical cells
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None of the above
A meristem is the tissue in most plants containing undifferentiated cells, found in zones of the plant, where growth can take place. Meristematic cells give rise to various organs of the plant and keep the plant growing. The shoot apical meristem gives rise to organs like the leaves and flowers, while the root apical meristem provides the meristematic cells for the future root growth.