NEET-UG Biology · Class 11
Phases of growth and growth rates — NEET & JEE Questions
Phases of growth and growth rates is a topic in Plant Growth and Development, a Class 11 Biology chapter of the NEET-UG syllabus. TestBudy holds 14 published NEET-UG questions on Phases of growth and growth rates, each with the marking scheme of the real paper.
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Phases of growth and growth rates MCQs with solutions
10 of the 14 published questions on this topic, exactly as they appear in a test. Answers and worked solutions come with your result rather than on this page.
The three broad phases of plant growth are commonly described as
- A. meristematic, elongation and maturation
- B. germination, fertilisation and meiosis
- C. photosynthesis, respiration and transpiration
- D. pollination, fertilisation and dispersal
In a growing root, which zone contains cells undergoing the most active mitotic division?
- A. Meristematic zone
- B. Zone of maturation
- C. Root-hair zone
- D. Fully differentiated zone
Cells in the meristematic phase of growth are characterised mainly by
- A. active cell division
- B. maximum cell size with no division
- C. thick secondary walls only
- D. complete loss of nuclei
A sigmoid growth curve typically includes
- A. an initial slow phase, a rapid growth phase and a later slowing toward a plateau
- B. a constant growth rate forever
- C. only a decreasing phase
- D. no relation between time and growth
Which one of the following is not a characteristic of plant cells in the phase of elongation?
- A. New cell wall deposition
- B. Cell enlargement
- C. Increased vacuolation
- D. Large conspicuous nuclei
Which of the following statements is not correct ?
- A. Phase of cell elongation of plant cells is characterized by increased vacuolation.
- B. Cells in the meristematic phase of growth exhibit abundant plasmodesmatal connections.
- C. Plant growth is generally determinate.
- D. Plant growth is measurable.
Which one of the following plants does not show plasticity?
- A. Cotton
- B. Coriander
- C. Buttercup
- D. Maize
Plants follow different pathways in response to environment of phases of life to form different kinds of structures. This ability is called
- A. Maturity
- B. Elasticity
- C. Flexibility
- D. Plasticity
A plant organ increases by the same absolute amount during each equal time interval. Which pattern is this?
- A. Geometric growth
- B. Arithmetic growth
- C. Exponential decay
- D. Photoperiodism
A group of actively dividing plant cells doubles repeatedly while resources remain abundant. Which pattern best fits this phase?
- A. Zero growth
- B. Arithmetic growth
- C. Geometric growth
- D. Vernalisation
Common mistakes in Phases of growth and growth rates
Recorded against questions in this topic that are not shown above, so none of these points at an answer you can see on this page.
- Comparing final masses without separating absolute and relative growth.
- Reports total growth rather than growth per unit time.
- Compares only absolute mass gain and ignores initial size.
- Confuses arithmetic growth with geometric growth in which both daughter cells continue dividing.
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