Both Xylem and Phloem are complex tissues. At maturity, the living component of xylem and the dead component of phloem respectively are:
 
  •     Xylem parenchyma and Phloem parenchyma
  •     Xylem parenchyma and Phloem fibres
  •     Xylem fibres and Phloem fibres
  •     Xylem fibres and Phloem parenchyma
Consider the two statements:
I. Intercalary meristem is a primary meristem and contributes to the formation of the primary plant body.
II. Cork cambium is a lateral meristem and produces secondary tissues.
  • Only I is correct
  • Only II is correct
  • Both I and II are correct
  • Both I and II are incorrect
Identify the incorrect statement:
  • Heart wood does not conduct water but it gives mechanical support to the stem.
  • Autumn wood or late wood has a large number of xylary elements having vessels with wider cavities.
  • Phloem fibers are generally absent in the primary phloem
  • Gymnosperms lack sieve tubes and companion cells
Which of the following statements is true regarding the complex tissues found in plants?
  • Phloem parenchyma is absent in most of the dicotyledons
  • Vessels are the characteristic feature of gymnosperms
  • The radial conduction of water takes place by the ray parenchymatous cells
  • The first formed phloem consists of bigger sieve tubes and is referred to as protophloem
What is the function of trichomes on the stems?
  • They help in absorption of water and minerals.
  • They help in preventing water loss due to transpiration.
  • They help in transpiration of water, the biological process by which water is lost in the form of water vapour from the aerial parts of the plants.
  • They allow interchange of gases between the internal tissue and the atmosphere.
The ‘ring’ arrangement of vascular bundles is a characteristic of:
  • Dicot stem
  • Monocot root
  • Dicot root
  • Monocot stem
Identify the incorrect statement regarding the secondary growth seen in plants:
  • Secondary growth does not occur in monocotyledons
  • The cells of secondary cortex are parenchymatous
  • Bark refers to all the tissues exterior to the vascular cambium, therefore it does not include secondary phloem
  • In the dicot root, the vascular cambium originates from the tissue located just below the phloem bundles, a portion of pericycle tissue, above the protoxylem forming a complete and continuous wavy ring, which later becomes circular
A diagram of the transverse section of a monocot leaf is given below with certain parts indicated as letters of the alphabet. Select the option which incorrectly matches the alphabet with the part it represents:
  • A - Adaxial epidermis
  • B - Phloem
  • C - Mesophyll
  • D - Abaxial epidermis
0:0:1


Answered Not Answered Not Visited Correct : 0 Incorrect : 0

Practice Botany Quiz Questions and Answers