NCERT Solutions Class 11 Biology Chapter 1 Living World

NCERT Solutions for Class 11 Biology Chapter 1: The Living World: The chapter on The Living World is important for students approaching the board exam. This article introduces NCERT solutions designed to help students explain the concepts of further learning and how to write to get good grades on exams. The solutions are presented in very simple language for ease of understanding.

NCERT CBSE Chapter 1: The Living World of class 11 explains the role of living organisms that are related to each other and also to all organisms that ever lived on this earth. We find to be cold mountains, deciduous forests, Oceans, freshwater lakes, deserts, and hot springs. Revise the basic concepts of The Living World for quick revision and class notes.

Q1: Why are living Organisms Classified?

Answer:

Most of the plants, animals, and microbes are found on Earth. All these organisms differ in shape, size, color, habitat which is a mode of nutrition, method of reproduction, and so many other characteristics present as there are millions of living organisms. at last, scientists have developed the mechanism to classify all living organisms.

• It can also help in the identification of living organisms.
• It can also help us to understand the relationship between the different groups of organisms and the diversity of various organisms.
• It can help us to study a wide variety of organisms.

Q2: Why are the Classification Systems Changing every now and then?

Answer:

The classification system of organisms changes according to the needs as they arise.  On Earth, there are millions of plants, animals, and microorganisms found. All these have been identified by scientists and many new species are still being discovered around the world wide. Scientists have developed a classification system that is based on evolutionary relationships, and morphological, physiological, and reproductive similarities. Depending on our improvement of understanding of the characteristics of evolutionary relationships similar changes will occur in the future too.

Q3: What different Criteria would you Choose to Classify People that you meet often?

Answer:

When we meet anybody in our day-to-day life, we observe them based on their characteristics, including gender, education qualification, profession, behavior, physical appearance, family member, relatives, friends and etc.

Q4: What do we learn from the Identification of Individuals and Populations?

Answer :

We learn from the identification of an individual or its entire population helps in the identification of there similarities and dissimilarities among individuals of the same kind or differences between types of organisms. 

Q5: Given below is the scientific name of Mango. Identify the correctly written name.

• Mangifera Indica
• Mangifera indica

Answer:

Mangifera indica is the correct scientific name for Mango. This is correct because the generic name always starts with a capital letter and the specific names start with a small letter.

Q6: Define a taxon. Give some examples of taxa at different hierarchical levels.

Answer:

Taxon is defined as a group of organisms classified as a unit. Examples of different hierarchical levels are species, genus, order, family, phylum, and kingdom.

Q7: Can you identify the correct sequence of taxonomical categories?

• (a) Species, Order, Phylum,  Kingdom
• (b) Genus, Species,  Order,  Kingdom
• (c) Species, Genus,  Order,  Phylum

Answer: 

(A) Species, Order, Phylum, and Kingdom. The correct sequence of taxonomic categories is from lowest to highest.

Q8: Try to collect all the currently accepted meanings for the word ‘species’. Discuss with your teacher the meaning of species in the case of higher plants and animals on the one hand, and bacteria on the other hand.

Answer:

Species are defined as a group of organisms that can reproduce with one another in nature and produce fertile offspring. In the case of higher plants and animals, the term species is defined as the largest group of similar organisms capable of interbreeding under natural conditions by sexual reproduction, to produce fertile offspring.

Q9: Define and understand the following terms:

                  (i) Phylum (ii) Class (iii) Family (iv) Order (v) Genus

Answer:

• Phylum: A phylum is a scientific term group together to relate organism on the basis of their fundamental characteristics.
• Class: A class has a major taxonomic rank below the phylum and above the order. 
• Family: A family is a taxonomic group containing one or more related genera.
• Order:  Order is a taxonomic group that contains one or more families.
• Genus:  Genus is a taxonomic rank that is used to classify living and extinct species, and viruses.

Q10: Illustrate the Taxonomical Hierarchy with suitable examples of a Plant and an Animal.

Answer:

Classification of plant: for example, Solanum melongena (Brinjal)

• Kingdom – Plantae
• Division – Angiospermae
• Class –  Dicotyledonae
• Order – Solanales
• Family – Solanaceae
• Genus – Solanum
• Species – melongena

Classification of an animal: example, Human

• Kingdom – Animalia
• Phylum – Chordata
• Class – Mammalia
• Order – Primate
• Family – Hominidae
• Genus- Homo sapiens- Sapiens