Prepare for NEET Biology Plant Growth and Development with MCQs & PYQs on NEET.GUIDE. Get free practice, previous year questions, and expert insights on plant hormones and growth regulators.
What is the term for the irreversible increase in size and/or dry weight of an organism?
Development
Differentiation
Growth
Maturation
Which phase of growth is characterized by the synthesis of new protoplasm and cell organelles?
G1
S
G2
M
Growth in plants is said to be open or indeterminate. What does this primarily refer to?
Fixed number of organs at maturity
Limited lifespan
Continuous cell division in meristematic tissues
Growth restricted to specific seasons
Which plant hormone promotes cell elongation and is involved in phototropism?
Gibberellin
Cytokinin
Abscisic acid
Auxin
Which hormone is primarily responsible for fruit ripening?
Auxin
Gibberellin
Ethylene
Cytokinin
Gibberellins are known to promote:
Leaf abscission
Fruit ripening
Stem elongation
Root inhibition
Cytokinins are primarily involved in:
Apical dominance
Senescence
Cell division
Dormancy
Which of the following is a gaseous plant hormone?
Auxin
Gibberellin
Cytokinin
Ethylene
Which of the following is NOT a characteristic of the lag phase in a bacterial growth curve?
Intense metabolic activity
Rapid cell division
Adaptation to the environment
Increase in cell size
