What is/are the effect/s of ethylene hormone in plants when it is in high concentration?
a) inhibits root growth
b) inhibits the development of auxiliary buds
c) promote dormancy
d) both a and b
Which of the plant hormone stimulates fruit ripening and induces several aspects of senescence in plant cells and organs?
a) ethylene
b) a cytokinin
c) auxins
d) gibberellins
Plant Movements:
The gametes of which of the following plants are motile?
a) algae
b) bryophytes
c) pteridophytes
d) all of these
According to the mechanism involved, plant movement can be categorized in to ………..major types.
a) two
b) three
c) four
d) five
Explanation: 1. Growth movements and 2. Turgor movements
Change in size of cell due to gain or loss of water is……..movement.
a) turgor
b) growth
c) tropic
Explanation: e.g the rolling of many grasses due to loss of water
