NCERT Solutions for class 11 Biology Chapter 2 : Biological Classification

NCERT Solutions for Class 11 Biology Chapter 2 Biological Classification are provided in the article below. It includes 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:

Five kingdom classification
Virus, Viroid, Prions and Lichen
Salient features and classification of Monera, Protista, and Fungi into major groups

Expected no. of Questions: 1-2 questions of around 3-4 marks.

Download PDF: NCERT Solutions for Class 11 Biology Chapter 2 Biological Classification

NCERT Solutions for Class 11 Biology Chapter 2

Class 11 Biology Chapter 2 Biological Classification: Important Topics

Biological classification is the process of identifying traits in living organisms and arranging them according to their characteristics. The study of living organism classification helps to study the common features of the group, only one or two species from each categorized category should be studied. It helps in the identification of new organisms.

Five Kingdom Classification

The five-kingdom classification was not the initial result of the classification of living organisms. Carolus Linnaeus was the first person to come up with a two-kingdom classification, which included only the kingdom Plantae and kingdom Animalia. Living things are divided into five kingdoms: animal, plant, fungi, protist and monera.

Chapter Related Links:

Kingdom Monera	Kingdom Protista	Kingdom Fungi
Kingdom Plantae	Kingdom Animalia	Ascomycetes
Deuteromycetes	Mumps	Bacteriophage

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.
Student to attempt either option (A) or (B).
(A)
(i) Describe the process of megasporogenesis in an angiosperm.
(ii) Draw a diagram of a mature embryo sac of the angiosperm. Label its any four parts.
OR
(B) The reproductive cycle in the female primates is called menstrual cycle. The first menstruation begins at puberty.
Answer the following questions:
(i) Name the four phases of menstrual cycle in a proper sequence.
(ii) How long does the menstrual phase last in a menstrual cycle?
(iii) When and why hormones estrogen and progesterone reach their peak levels respectively, in the menstrual cycle?
(iv) Give the significance of LH surge.
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2.
Student to attempt either option (A) or (B):
(A) Write two features of an ideal contraceptive. Explain any one natural contraceptive method that makes the chances of conception almost nil.
(B) Explain GIFT and ICSI.
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3.
If a natural population of 60 individuals is in Hardy-Weinberg equilibrium for a gene with two alleles B and b, with the gene frequency of allele B of 0.7, the genotype frequency of Bb will be:
- ( 0.21 )
- ( 0.42 )
- ( 0.49 )
- ( 0.56 )
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4.
Why are restrictions imposed on MTP in India? Up to how many weeks or trimesters, is MTP considered relatively safe for a female, if necessary to perform, by a medical practitioner?
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5.
(a) A bilobed dithecous anther has 200 microspore mother cells per microsporangium. How many male gametophytes can be produced by this anther?
(b) Write the composition of intine and exine layers of a pollen grain.
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6.
Study the given molecular structure of double-stranded polynucleotide chain of DNA and answer the questions that follow.

(a) How many phosphodiester bonds are present in the given double-stranded polynucleotide chain?
(b) How many base pairs are there in each helical turn of double helix structure of DNA? Also write the distance between a base pair in a helix.
(c) In addition to H-bonds, what confers additional stability to the helical structure of DNA?
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