The dead element present in the phloem is
  • companion cells
  • phloem fibres
  • phloem parenchyma
  • sieve tubes
Which of the following does not lose their nucleus at maturity?
  • Companion cells
  • Red blood cells
  • Vessel
  • Sieve tube cells
In desert plants, rate of water loss gets reduced due to the presence of
  • cuticle
  • stomata
  • lignin
  • suberin
A long tree has several branches. The tissue that helps in the side ways conduction of water in the branches is
  • collenchyma
  • xylem parenchyma
  • parenchyma
  • xylem vessels
¡f the tip of sugar cane plant is removed from the field, even then it keeps on growing in length. It is due to the presence of
  • cambium
  • apical meristem
  • lateral meristem
  • intercalary meristem
A nail is inserted in the trunk of a tree at a height of 1 metre from the ground level. After 3 years the nail will
  • move downwards
  • move upwards
  • remain at the same position
  • move sideways
Parenchyma cells are
  • relatively unspecified and thin-walled
  • thick walled and specialised
  • lignified
  • none of these
Flexibility in plants is due to
  • collenchyma
  • scierenchyma
  • parenchyma
  • chiorenchyma
Cork cells are made impervious to water and gases by the presence of
  • cellulose
  • lipids
  • suberin
  • lignin
Survival of plants in terrestrial environment has been made possible by the presence of
  • intercalary meristem
  • conducting tissue
  • apical meristem
  • parenchymatous tissue
Choose the wrong statement.
  • The nature of matrix differs according to the function of the tissue
  • Fats are stored below the skin and in between the internal organs
  • Epithelial tissues have intercellular spaces between them
  • Cells of striated muscles are multinucle ate and unbranched
The water conducting tissue generally present in gymnosperm is
  • vessels
  • sieve tube
  • tracheids
  • xylem fibres
Girth of stem increases due to
  • intercalary meristem
  • lateral meristem
  • vertical meristem
  • apical meristem
Meristematic tissues in plants are
  • localised and permanent
  • not limited to certain regions
  • growing in volume
  • localised and dividing cells
Contractile proteins are found in
  • cartilage
  • bones
  • blood
  • muscles
Which muscles act involuntarily? (i) Striated muscles (ii) Smooth muscles (iii) Cardiac muscles (iv) Skeletal muscles
  • (i) and (ii)
  • (ii) and (iii
  • (iii) and (iv)
  • (i) and (iv)
Which of the following tissues has dead cells?
  • Collenchyma
  • Parenchyma
  • Sclerenchyma
  • Epithelial tissue
Bone matrix is rich in
  • fluoride and calcium
  • phosphorus and potassium
  • calcium and potassium
  • calcium and phosphorus
A person met with an accident in which two long bones of hand were dislocated. Which among the following may be the possible reason?
  • Tendon break
  • Ligament break
  • Areolar tissue break
  • Break of skeletal muscle
Intestine absorb the digested food materials. What type of epithelial cells are responsible for that?
  • Columnar epithelium
  • Spindle fibres
  • Stratified squamous epithelium
  • Cuboidal epithelium
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