Download App

Plant Growth and Development — BIOLOGY STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceBIOLOGYPlant Growth and Development1 Mark
MCQ
High concentration of auxin is present in:
  • A
    Root apex
  • B
    Shoot apex
  • C
    Petiole
  • D
    Node
✓

Answer

  1. Shoot apex

Explanation:

Auxin is a plant hormone. It is produced in high concentration at the shoot apex.Apical dominance is a phenomenon in which central stem is dominant and lateral stems are suppressed.It promotes stem elongation and inhibits growth of lateral buds.Hence, low concentration of auxin inhibits growth in shoot.

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

Explore more

More "M.C.Q (1 Marks)" from Plant Growth and Development→Plant Growth and Development — all question types→BIOLOGY STD 11 Science question papers→Rajasthan Board STD 11 Science question papers→Rajasthan Board question paper generator→

Similar questions

Which of the following occurs only in meiosis:
→
Sclereids are commonly found in
→
In which of the following respect, the plant hormones differ from enzymes
→
Name of cells which help in clotting of blood in mammals ____________:
→
Select the incorrect pair :
→
Match the organisms in Column$-I$ with habitats in Column$-II$

Column$-I$ Column$-II$
$(a)$ Halophiles $(i)$ Hot springs
$(b)$ Thermoacidophiles $(ii)$ Aquatic environment
$(c)$ Methanogens $(iii)$ Guts of ruminants
$(d)$ Cyanobacteria $(iv)$ Salty area

Select the correct answer from the options given below

→
In aquatic organisms, the end product of nitrogen exchange is
→
In light reaction, plastoquinone facilitates the transfer of electrons from 
→
Glycolysis takes place in
→
Assertion : Lipids present in the outer and inner side of the bilayer membrane are commonly different.
Reason : Oligosaccharides are attached to external surface as well as inner surface of a biomembrane.
→