Question

Which statements are correct?
$a$ - Cytokinins suppress the synthesis of chlorophyll
$b$ - Auxins control apical dominance
$c$ - Gibberellins promote shoot elongation
$d$ - Abscisic acid enables seeds to with-stand desication.

• A. $a$ and $b$ only
• B. $b$ and $c$ only
• C. $a$ and $c$ only
• D. $b$, $c$ and $d$ only
• E. $c$ and $d$ only

Answer 1

The correct option is D $b$, $c$ and $d$ only

Cytokinin is a plant hormone that promotes cell division. It also delays the destruction of chlorophyll and protein. Gibberellin is a plant hormone that is involved in various plant processes like shoot elongation, germination, dormancy, leaf and fruit senescence. Apical dominance is a phenomenon in which central stem is dominant and lateral stems are suppressed. It is due to plant hormones auxin produced in the tip of the shoot. Abscisic acid is a stress hormone. It helps seeds to withstand adverse environmental conditions such as desiccation, drought.

Thus, the correct answer is option D.