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Xam Idea Class 12 Biology Solutions

Xam Idea Class 12 Biology Solutions is one of the best learning guides to be used for CBSE Class 12 and other competitive exams preparation. Xam Idea Class 12 solutions for Biology covers all the important concepts and answers all questions in a stepwise and comprehensive manner. They have been written by expert Biology teachers. Also, all solutions are given in an easy-to-understand and interactive format to give you the best learning experience.

Xam Idea solutions for Class 12 Biology book contain different types of questions for your practice. All the chapters of CBSE syllabus have been covered exhaustively. The topics covered in syllabus are sexual reproduction in humans and flowering plants, reproductive health, principles of inheritance and variation, the molecular basis of inheritance, evolution, human health and diseases, strategies for augmenting food production, microbes in human welfare, principles, processes, and its application of biotechnology, organisms and populations, biodiversity and conservation and environmental issues.

Our solutions include tailor-made answers elaborated in a relatively simple language. They help you acquire in-depth knowledge of all the concepts covered and enable you to tackle any question type in your board examinations. They have been designed to help you in revising and remembering the concepts well and score good marks in board exams and other competitive exams.

Class 12

Xam Idea Class 12 Biology Solutions: Chapter-wise

The topics covered in Xam Idea Class 12 Biology Book are discussed below. The questions asked in this book are of the following types – very short answer questions (VSAQ), short answer questions (SAQ), and long answer questions (LAQ). 

Xam Idea Class 12 Biology Chapter 1 (Reproduction in Organisms) Solutions

Reproduction in Organisms chapter teaches you about reproduction in organisms and explains how various organisms are able to give birth to their progenies. It further teaches you that there are two types of reproduction; first is asexual type, where offspring is given life by a single parent with or without the involvement of gamete formation and second is sexual reproduction when two parents of opposite sex participate in the fertilisation process involving the fusion of male and female gametes.

The process of formation of gametes in plants and animals is also described in this chapter. All the concepts are elaborately explained with the help of relevant diagrams and suitable examples. The first chapter has 73 VSAQs, 35 SAQs and 6 LAQs. 

Xam Idea Class 12 Biology Chapter 2 (Sexual Reproduction in Flowering Plants) Solutions

The 2nd chapter of Xam Idea Class 12 Solutions of Biology deals with all the concepts related to sexual reproduction in flowering plants while explaining the morphology of flowers, structure and the processes of sexual reproduction in angiosperms. Here you come to know about, the process of formation of male and female gametes in plants and how are they involved in the production of new plant varieties. It teaches you about microsporogenesis which is the formation of microspore from the PMC through the process of meiosis. 

This chapter elaborately describes pre-fertilisation-structure and events, the process of double fertilisation, post-fertilization events, apomixis and polyembryony in flowering plants. Here you get to solve 62 VSAQs, 90 SAQs and 17 LAQs. 

Xam Idea Class 12 Biology Chapter 3 (Human Reproduction) Solutions

Class 12 Biology Human Reproduction chapter teaches you about the processes involved with human reproduction and the process of fertilisation. You learn here that reproductive events in humans include the formation of gametes (gametogenesis), i.e., sperms in males and ovum in females. The main topics you learn here are the details of the human male and female reproductive system, the process of gametogenesis, menstrual cycle, fertilisation and implantation, pregnancy and embryonic development and finally parturition and lactation. This chapter has 43 VSAQs, 80 SAQs and 46 LAQs. 

Xam Idea Class 12 Biology Chapter 4 (Reproductive Health) Solutions

Chapter 4 of Xam Idea Class 12 Biology book deals with knowledge about healthy reproductive organs with normal functions which means complete wellness in all facets of reproduction, i.e., physical, emotional, behavioural and social. It covers subtopics such as reproductive health – problems and strategies, population explosion and birth control, medical termination of pregnancy, sexually transmitted diseases, infertility. You will get 30 VSAQs, 48 SAQs and 9 LAQs in this chapter. 

Xam Idea Class 12 Biology Chapter 5 (Principles of Inheritance and Variation) Solutions

Genetics is a branch of Biology that deals with the inheritance and principles of variation in hereditary characters, inherited features and other characteristics. Study of genetics and variation exhibited by different species enables us to explain the differences in characteristics and helps to understand the process of evolution. 

Variation is the degree by which progeny differ from their parents, and inheritance is the process by which characters are passed on from parent to progeny. In this chapter, you learn in detail about Mendel’s laws of inheritance, the inheritance of one gene, the inheritance of two genes, sex determination, mutation and conditions of genetic disorders. You need to solve 76 VSAQs, 95 SAQs and 47 LAQs here. 

Xam Idea Class 12 Biology Chapter 6 (Molecular Basis of Inheritance) Solutions

The 6th chapter of Xam Idea Class 12 Biology book tells you that the molecular basis of inheritance actually describes the inheritance patterns and the genetic basis called ‘factors’ regulating the pattern. This chapter gives you in-depth knowledge of the DNA and RNA, the search for genetic material, the process of replication to form new DNA, transcription to form RNA. 

You learn further about genetic code, translation process for preparing protein molecules, regulation of gene expression in organisms, and the much inquisitive topics of the human genome project and DNA Fingerprinting. This chapter has 76 VSAQs, 136 SAQs and 67 LAQs.

Xam Idea Class 12 Biology Chapter 7 (Evolution) Solutions

The topic evolution in biology deals with the study and theoretical aspects of the history of life forms on Earth and how one life form changed into another. In this chapter, you learn in detail about the subtopics such as the origin of life, evolution of life forms – a theory, evidence for evolution, adaptive radiation, biological evolution, mechanism of evolution. 

You learn about adaptive radiation and biological evolution and the different related concepts. Further, you learn about the Hardy – Weinberg principle, a brief account of evolution and finally the origin and evolution of man. Here you get 78 VSAQs, 94 SAQs and 23 LAQs for practice.  

Xam Idea Class 12 Biology Chapter 8 (Human Health and Diseases) Solutions

Chapter 8 of Xam Idea Class 12 Biology teaches you that health is a state of body and mind in a balanced manner. This chapter teaches you that factors affecting health are – (i) genetic disorders – chromosomal deficiencies/defects in a newly born which the child inherits from parents from birth; (ii) various infections and (iii) lifestyle issues including nutrition and food, rest and exercise habits. Further, you learn about common ailments in humans, immunity, AIDS, cancer, drugs and alcohol abuse. This chapter has 75 VSAQs, 105 SAQs and 22 LAQs that sufficiently cover all concepts of the chapter.

Xam Idea Class 12 Biology Chapter 9 (Strategies for Enhancement in Food Production) Solutions

In chapter  9 of Xam Idea Class 12 Biology book, it has been taught that the population of our world is ever-increasing, and it is very necessary to increase food production. To achieve this, we need to apply biological principles to animal husbandry and plant breeding techniques to put positive efforts in increasing food production in the world. This chapter explains the science and technology behind various practices observed in related industries.

You learn about new techniques like embryo transfer technology and tissue culture techniques for further enhancing food production. You also learn concepts related to animal husbandry, plant breeding, single-cell proteins and tissue culture techniques. The concepts dealt in detail in this chapter are the role of animal husbandry in human welfare, dairy farm management, poultry farm management, apiculture, plant breeding, single-cell protein (SCP) and tissue culture. This chapter consists of 50 VSAQs, 91 SAQs and 11 LAQs.

Xam Idea Class 12 Biology Chapter 10 (Microbes in Human Welfare) Solutions

Chapter 10 of Xam Idea Class 12 Biology Solutions teaches you that along with macroscopic plants and animals, microbes form the major components of Earth’s diverse biological systems. Microbes can be protozoa, bacteria, fungi and other microscopic animals, plant viruses and viroids. 

You also learn about the following subtopics dealing with the use of microbes in – household products, industrial products, sewage treatment, production of biogas; along with microbes as biocontrol agents and biofertilizers. This chapter contains 44 VSAQs, 77 SAQs and 12 LAQs. They cover all corners of the chapter

Xam Idea Class 12 Biology Chapter 11 (Biotechnology: Principles and Processes) Solutions

Chapter 11 tells you about biotechnology which is the science of using live organisms or enzymes of organic origin to produce products and processes useful to humans. 

You come to know about traditional and modern molecular biotechnology techniques used. You learn the principles, processes and applications of biotechnology. You further learn about the subtopics such as principles of biotechnology, tools and processes of recombinant DNA technology. Here you find 44 VSAQs, 77 SAQs and 12 LAQs.

Xam Idea Class 12 Biology Chapter 12 (Biotechnology and its Application) Solutions

This chapter of Xam Idea Class 12 Biology tells you how biotechnology can be used for industrial-scale production of various products like biopharmaceuticals, using genetically modified microbes, fungi, plants and animals. You further come to learn the applications of biotechnology, including the field of therapeutics, diagnostics, genetically modified crops, processed food, bioremediation, waste treatment, and energy production.

Further, you learn topics such as transgenic animals and Ethical Issues. You get to solve 42 VSAQs, 100 SAQs and 12 LAQs. They comprehensively cover the whole unit. 

Xam Idea Class 12 Biology Chapter 13 (Organisms and Populations) Solutions

The chapter 13 of Xam Idea Class 12 Biology teaches you that interactions among organisms and its physical or abiotic environment is known as ecology and is studied at four levels of biological organisation – organisms, populations, communities and biomes. This chapter explores ecology at organism and population levels. You learn about the organism and its environment and characteristics of populations in this chapter. This chapter consists of 45 VSAQs, 76 SAQs and 7 LAQs.

Xam Idea Class 12 Biology Chapter 14 (Ecosystem) Solutions

Ecosystem chapter teaches you that an ecosystem is a functional unit of nature, where living organisms interact with the surrounding physical environment and also among themselves. Further, you learn about the structure of the ecosystem explaining the terms like input or productivity; transfer of energy through food chain/web and nutrient cycles; and the output or degradation and energy loss. 

Relationships among the components of an ecosystem like cycles, chains and webs have been discussed in detail in this chapter. You also learn the topics, ecosystem–structure and function, productivity, decomposition, energy flow, ecological pyramids, ecological succession, nutrient cycling and ecosystem services in detail in this chapter. You can practise the concepts taught in this chapter with 50 VSAQs, 70 SAQs and 17 LAQs.

Xam Idea Class 12 Biology Chapter 15 (Biodiversity and Conservation) Solutions

Chapter 15 teaches you topics like genetic diversity, species diversity, ecological diversity, different types of species, patterns of diversity, loss of biodiversity, and biodiversity conservation. You learn here that biodiversity conservation may be in-situ where the endangered species are protected in their natural habitat; as well as ex-situ which include protective maintenance of threatened species in zoological parks and botanical gardens. Further, you learn about in vitro fertilisation, tissue culture propagation and cryopreservation of gametes. This chapter contains 45 VSAQs, 52 SAQs and 18 LAQs.

Xam Idea Class 12 Biology Chapter 16 (Environmental Issues) Solutions

The last chapter of Xam Idea Class 12 Biology Solutions teaches you an increase in human population worldwide has led to an increase in demand for home, electricity, food, water, fuel, roads, automobiles and numerous other commodities. Overuse of resources available on Earth causes pollution which is defined as the unwanted change in chemical, physical, or biological characteristics of air, land, water or soil and agents that bring about such undesirable changes are known as pollutants.

You further learn about air pollution and its control, water pollution and its control, solid wastes, agrochemicals and their effects, radioactive wastes, greenhouse effect and global warming, ozone depletion in the stratosphere, degradation by improper resource utilisation and maintenance and deforestation. This chapter has 25 VSAQs, 52 SAQs and 11 LAQs.