Prepare for NEET with Botany-specific practice questions. Covering all major Botany chapters, this is perfect for your NEET Biology needs.
Which of the following plant hormones is primarily responsible for apical dominance?
Gibberellin
Cytokinin
Abscisic acid
Auxin
Which hormone is involved in the phenomenon of phototropism?
Gibberellin
Cytokinin
Ethylene
Auxin
Which plant hormone is commonly employed for weed control in agricultural fields?
Gibberellin
Cytokinin
2,4-D
Abscisic acid
Farmers often use a synthetic version of which plant hormone class to eliminate unwanted plants in their crops?
Gibberellins
Cytokinins
Auxins
Abscisic acid
Which of the following is NOT a naturally occurring plant hormone but is synthetically produced for weed control?
Gibberellin
Cytokinin
Abscisic acid
2,4-D
A plant hormone, auxin, plays a significant role in root development. Primarily, auxin influences which process in the root tip for growth?
Cell differentiation
Cell division
Cell elongation
Root hair formation
The Avena curvature test is a bioassay used to detect and quantify which plant hormone?
Gibberellins
Cytokinins
Auxins
Abscisic acid
Which of the following plant growth responses is utilized in the Avena curvature test?
Apical dominance
Seed germination
Fruit ripening
Differential growth
In the Avena curvature test, if an agar block without auxin is placed on the decapitated coleoptile, what will be the observed response?
Positive curvature
Negative curvature
No curvature
Random curvature
The Avena curvature test primarily demonstrates the effect of auxins on which plant part?
Root
Stem
Leaf
Coleoptile
