Question

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01. Following figure shows the effect of plant growth substances on the stem of plants


a).What are plant growth substances?

b).What is the plant growth substance which result the change in given above figure?

c). What is controlled by the plant growth substance mentioned in above(b)?

d). Name one auxin which naturally found in plants?

e). What is the reason for the growth of the plant stem tip towards the light?

f).Mention the plant growth substances effect on following functions.

 Elongation of stem

 Acceleration of cell division

g). What is the tissue layer found at the end of the naturally fallen leaf stalk?

h). What is the function of the above tissue layer?

i). Write a use of each artificial growth substances given below.

 NAA

 2,4 DPA

 Cytocell

Answer 1

Answer:

auxin molecules,

a. auxin, b.