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.
Which of the following extra-embryonic membranes in amniotes primarily functions in waste storage?
Chorion
Amnion
Yolk sac
Allantois
Ethylene is unique among plant growth regulators due to its:
Ability to promote cell division
Role in seed dormancy
Gaseous nature
Synthesis in the root apical meristem
Which plant hormone is primarily responsible for inducing dormancy in seeds and buds, enabling them to withstand unfavorable environmental conditions?
Gibberellin (GA)
Auxin (IAA)
Cytokinin (CK)
Abscisic Acid (ABA)
Phytochrome is involved in many plant responses besides flowering. Which of the following is NOT a known role of phytochrome?
Seed germination
Shade avoidance response
Regulation of stomatal closure
Photomorphogenesis
Which part of the plant perceives the cold stimulus during vernalisation?
Leaves
Roots
Shoot apical meristem
Flowers
During embryonic development, the formation of the three germ layers (ectoderm, mesoderm, and endoderm) is known as:
Cleavage
Organogenesis
Neurulation
Gastrulation
The process of programmed cell death during development is called:
Necrosis
Mitosis
Meiosis
Apoptosis
The process of development of fruits without fertilization is called:
Polyembryony
Apomixis
Parthenogenesis
Parthenocarpy
The transformation of a larva into an adult through drastic changes is termed:
Embryogenesis
Gametogenesis
Regeneration
Metamorphosis
Growth in plants is generally:
Determinate
Indeterminate
Always localized
Only in the embryonic stage
