NCERT Solutions For Class 11 Biology Chapter 15: Plant Growth and Development

NCERT Solutions for Class 11 Biology Chapter 15 Plant Growth and Development are provided in the article below. It contains all the important definitions, concepts, and methodologies that will be really beneficial for the students appearing for CBSE Class 11 Exam 2022-23. The important topics that are included in this chapter are:

Expected no. of Questions: 1-2 questions of around 3 marks.

Download PDF: NCERT Solutions for Class 11 Biology Chapter 15 Plant Growth and Development

NCERT Solutions for Class 11 Biology Chapter 15

Class 11 Biology Chapter 15 Plant Growth and Development: Important Topics

Plant growth is accomplished by cell division, increase in cell number, and cell enlargement. So, growth is a quantitative phenomenon that can be measured in relation to time. Plant growth is generally indeterminate due to the capacity for unlimited growth throughout life.

Seed Germination

Seed germination is referred to as the fundamental process with the help of which different plant species grow from a single seed into a plant. This process affects both crop yield and quality. A common example of seed germination is the sprouting of a seedling from a seed of an angiosperm or gymnosperm.

Growth Regulators

There are, generally, five types of plant hormones, namely, auxin, gibberellins (GAs), cytokinins, abscisic acid (ABA), and ethylene. Apart from these, there are more derivative compounds, both natural and synthetic, which also act as plant growth regulators.

Chapter Related Links:

Auxins	Gibberellins	Photoperiodism
Seed Dormancy	Phototropism	Seed Definition
Growth Development	Stress Hormones	Plant Roots

CBSE Class 11 Biology Study Guides:

CBSE Class 11 Biology Syllabus	CBSE Class 11 Biology NCERT Textbook	CBSE Class 11 Biology Sample Paper
Biology Study Material	Biology MCQs	Difference between in Biology

CBSE CLASS XII Related Questions

1.
Read the following passage and answer the questions that follow:
India is one of the megadiverse countries housing around 8·1 per cent of global species diversity, although its land area is only 2·4 per cent of the world’s land area. Many of the species are highly threatened due to human activities like deforestation, mining and habitat fragmentation. Laws like Wildlife (Protection) Act, 1972 were enacted by the Government of India to preserve our biological wealth. Various conservation measures are being implemented to save the threatened species. The following bar graph shows the number of species conserved under different biodiversity conservation methods.

Which other methods shown in the diagram are opposite to the one identified by you in question ? How are these two conservation approaches different?
(c) Write two features of Biodiversity hotspots.
(c) To which category do sacred groves belong and how do they help in bio-conservation?

2.
Describe the experiment conducted by T.H. Morgan on Drosophila melanogaster involving eye colour and body colour.
How did the results deviate from Mendelian inheritance pattern ?
(c) Explain the two genetic terms used by Morgan for his observations.

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3.
What is the carrying capacity of a species in a habitat?
Explain the growth curve that takes this capacity into account.

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4.
Oogenesis is a discontinuous process that begins before birth and is completed after puberty.
Trace the development of a gamete mother cell till its release from the ovary during ovulation.
Name the two pituitary hormones that play an important role in the process.

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5.
Draw a labelled two-celled structure of male gametophyte of an angiosperm.
Name the three layers that surround the cytoplasm of a male gametophyte starting from innermost to outermost layer.
(iii) Which organic material makes the outermost layer? Mention its advantage.
(iv) Why is the outermost layer of male gametophyte not continuous ?

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6.
Cow dung and water are mixed and fed into a biogas plant to allow digestion of biowastes. The person performing this process says that there is no need to provide an inoculum.
Do you agree with him? Justify your answer.
What happens to the biowaste inside the digester ?
(c) Name the useful by-products obtained from this process and mention how they are used.

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NCERT Solutions For Class 11 Biology Chapter 15: Plant Growth and Development

NCERT Solutions for Class 11 Biology Chapter 15

Class 11 Biology Chapter 15 Plant Growth and Development: Important Topics

Seed Germination

Growth Regulators

CBSE CLASS XII Related Questions

2.
Describe the experiment conducted by T.H. Morgan on Drosophila melanogaster involving eye colour and body colour.
How did the results deviate from Mendelian inheritance pattern ?
(c) Explain the two genetic terms used by Morgan for his observations.

3.
What is the carrying capacity of a species in a habitat?
Explain the growth curve that takes this capacity into account.

4.
Oogenesis is a discontinuous process that begins before birth and is completed after puberty.
Trace the development of a gamete mother cell till its release from the ovary during ovulation.
Name the two pituitary hormones that play an important role in the process.

Similar Biology Concepts

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NCERT Solutions For Class 11 Biology Chapter 15: Plant Growth and Development

NCERT Solutions for Class 11 Biology Chapter 15

Class 11 Biology Chapter 15 Plant Growth and Development: Important Topics

Seed Germination

Growth Regulators

CBSE CLASS XII Related Questions

2.Describe the experiment conducted by T.H. Morgan on Drosophila melanogaster involving eye colour and body colour. How did the results deviate from Mendelian inheritance pattern ? (c) Explain the two genetic terms used by Morgan for his observations.

3.What is the carrying capacity of a species in a habitat? Explain the growth curve that takes this capacity into account.

4.Oogenesis is a discontinuous process that begins before birth and is completed after puberty. Trace the development of a gamete mother cell till its release from the ovary during ovulation. Name the two pituitary hormones that play an important role in the process.

Similar Biology Concepts

Comments

SUBSCRIBE TO OUR NEWS LETTER

2.
Describe the experiment conducted by T.H. Morgan on Drosophila melanogaster involving eye colour and body colour.
How did the results deviate from Mendelian inheritance pattern ?
(c) Explain the two genetic terms used by Morgan for his observations.

3.
What is the carrying capacity of a species in a habitat?
Explain the growth curve that takes this capacity into account.

4.
Oogenesis is a discontinuous process that begins before birth and is completed after puberty.
Trace the development of a gamete mother cell till its release from the ovary during ovulation.
Name the two pituitary hormones that play an important role in the process.