Plant Growth and Development Test - 2

Abscisic acid is not involved in growth promoting activities. It is involved in various growth inhibiting activities such as dormancy and abscission.

F. W. Went isolated auxin from the tips of coleoptiles of oat seedlings.

This is the correct option as this is not a use of auxins. Gibberellins delay senescence.

 Ethylene is responsible for enhancing the respiration rate during ripening of the fruits.

Triacontanol is a fatty alcohol that acts as a growth stimulant, especially initiating new basal breaks in the rose family.

Mesembryanthemum crystallinum is a low-growing succulent that spreads over the ground with flat, fleshy leavesis. It is able to alter its photosynthetic pathways to use less water when it becomes water or salt stressed.THus, this is an adaptation to conserve water.

Physiological activity of growing plants is maximum at log phase of growth. Log phase is the period of maximum and rapid growth. Physiological activities of cells are at their maximum.

There are some Arctic plants that have apical meristem on the middle or lower part of the plant. It evolved due to the fact that it is advantageous in certain Arctic conditions.

Strigolactones hormones are associated with apical dominance. They are shown to be involved in inhibition of branching. As a result of this, the plant has only one main trunk.