MCQ
Tropic movement is due to
  • Cell elongation
  • B
    Cell division
  • C
    Both $ (a)$ and $ (b)$
  • D
    Cell thickening

Answer

Correct option: A.
Cell elongation
a
(a)Tropic movement are caused by cell elongation and do not affect the whole plant.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

Study the following statements.
$I.$ $“X”$ hormone promotes root growth and root hair formation thus helping the plants to increase their absorption surface.
$II.$ $“Y”$ hormone induces flowering in mango and also promotes rapid internode/petiole elongation in deep plants and hence helping leaves or upper parts of shoot above water.
$III.$ $“Z”$ hormone inhibits the seed germination, increase the tolerance of plant to various stresses, play import in seed development, maturation and dormancy.
Identify the correct names of hormones marked as $‘X’, ‘Y’$ and $‘Z’.$
For the process of photosynthesis all except one of the following items are essential. Point out the exception
Statement - I - Early greek thinkers thought units of life called spores were transferred to different planets including earth.
Statement - II - For a long time it was also believed that life comes out of decaying and rotting matter like straw, mud etc. this was the theory of spontaneous genera-tion.
Which one of the following combination is mismatched?
Arrange these events of mitosis in their sequence.

$a -$ Nuclear envelope assembles around chromosomes clusters.

$b -$ Spindle fibers attach to kinetochores of chromosomes.

$c-$ Condensation of chromosomes.

$d -$ Centromeres split and chromatids separate.

Match the plant with the kind of life cycle it exhibits:

$List-I$ $List - II$
$(a)$ Spirogyra $(i)$ Dominant diploid sporophyte vascular plant, with highly reduced male or female gametophyte
$(b)$ Fern $(ii)$ Dominant haploid free-living gametophyte
$(c)$ Funaria $(iii)$ Dominant diploid sporophyte alternating with reduced gametophyte called prothallus
$(d)$ Cycas $(iv)$ Dominant haploid leafy gametophyte alternating with partially dependent

Choose the correct answer from the options given below:

Which of the following is absent in prokaryotes?
After meiosis I, the resultant daughter cells have
After two or three years of the secondary growth, the cortex in dicot root
Identify alkoid from given