2018 jambite readers & leaders

Group Admin: M-RAY
Created on: 28th February 2018
# Members: 95  
Institution: Nnamdi Azikiwe University

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Group Discussions (22)

Neshi
2 years ago
Who is a foil character?
sokoyapromise
2 years ago
a foil is a character who contrasts with another character
erhahon
2 years ago
Physics, chemistry, mathematics and English
Gift
2 years ago
What is petrochemical?
Perky
2 years ago
What is aetiolation in biology?
  • onye: is a process in
    flowering plants grown in partial or complete absence of light. [1] It is characterized by long, weak stems; smaller leaves due to longer internodes; and a pale yellow color ( chlorosis ).
    Effects
    Edit
    Etiolation increases the likelihood that a plant will reach a light source, often from under the soil, leaf litter, or shade from competing plants. The growing tips are strongly attracted to light and will elongate towards it. The pale color results from a lack of chlorophyll.
    Some of the changes that occur include:
    1. elongation of stems and leaves;
    2. weakening of cell walls in stems and leaves;
    3. longer internodes, hence fewer leaves per unit length of stem;
    4. chlorosis, a pale yellowish-white coloration.
    De-etiolation is the transition of seedlings from below-ground growth to above-ground growth form. [2]
    Causes
    Edit
    Elongation is controlled by the plant hormones called auxins , which are produced by the growing tip to maintain apical dominance. Auxin diffuses, and is transported, downwards from the tip, with effects including suppressing growth of lateral buds. [3] Auxins are active in light; when they are active they stimulate proton pumps in the cell wall which increases the acidity of the cell wall and activates expansin (an enzyme that breaks bonds in the cell wall structure) that weaken the cell wall and allow the cell to expand. [4]
    Chloroplasts that have not been exposed to light are called etioplasts
    Like 2    Dislike 0   2 years ago
Prince
2 years ago
Admin Please add this number:
08124415310
M-RAY
2 years ago
JAMB CUT OFF MARK WILL BE ANNOUNCE ON 26 0F JUNE 2K18🙌🙌🙌
M-RAY
2 years ago
JAMB CUT OFF MARK WILL BE ANNOUNCE ON 26 0F JUNE 2K18
mrnothenextin
2 years ago
Please add me on whatsp
08105494613
all about studying and giving d latest info. about school.

 08112740865

 ogechukwublessing@gmail.com

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