Selina Solutions for Class 9 Biology Chapter 1 - Introducing Biology

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Selina Solutions for class 9 Biology Chapter 1 – Introducing Biology

Progress Check

1. 1. Name the specific branches of Biology concerned with the study of

(i) Fungi (ii) Fishes (iii) Insects (iv) Transmission of body characteristics from parents to children

Solution:-

The specific branches of Biology related with the study of the following are:

1. 1. Fungi – Mycology
   2. Fishes – Ichthyology
   3. Insects – Entomology
   4. Transmission of body characteristics from parents to children – Genetics

2. 2. Mention the kind of study made under the following branches of science:

(i) Histology (ii) Ecology (iii) Cytology (iv) Pathology

Solution:-

Listed below are branches of science dealing with corresponding fields of study:

2. 1. Histology – It is the study of minute structures of tiny bits at the tissue level of the body as observed under a compound microscope.
   2. Ecology – It is the study of the relationship of an entity relative to its abiotic (non-living) and biotic (living) environment.
   3. Cytology – It is the study of function and structure of plant and animal cells.
   4. Pathology – It is the study of plant and animal diseases.

Review Questions

A. Multiple Choice Type

1. 1. Choose the most appropriate option in the following statements.

a) Paleontology is the study of

i) Embryos (ii) Blood (iii) Classification (iv) Fossils

Solution: (iv) Fossils

It is the study of prehistoric forms of life through fossils of animals and plants.

1. 1. Clones of animals are being produced through the practice of

(i) Genetics (ii) Ecology (iii) Embryology (iv) Biotechnology

Solution: (iv) Biotechnology

This field deals with using cells or microorganisms in technology and industry.

B. Very Short Answer Type

1. 1. Name the following branches of biology
      1. Application of biological processes in technologies
      2. Science of growing fruits and vegetables
      3. Study of prehistoric forms of life
      4. Study of causes of immunity (resistance to or defense against diseases)
      5. Study of fishes

Solution:-

1. 1. Biotechnology
   2. Horticulture
   3. Paleontology
   4. Immunology
   5. Ichthyology

2. 2. Fill in the blanks:
      1. Bioengineering deals with making artificial _________.
      2. __________ is the entire DNA sequence of an organ.
      3. Silk is produced by rearing __________
      4. Evolution deals with the study of ___________ and __________ of organisms.
      5. Organisms which draw food from the host body are called __________
      6. Animals which give birth to young ones are known as ___________
      7. ___________ is called the Father of Medicine.

Solution:

2. 1. Joints and Limbs
   2. Genome
   3. Silkworm
   4. Descent, origin
   5. Parasites
   6. Viviparous
   7. Hippocrates

3. 3. Match the branches of biology in Column A with the respective areas of study in Column B.

Solutions:-

4. 4. Name any two borderline sciences which are connected with Biology.

Solution:-

Listed below are two sciences interlinked with Biology:

4. • Biotechnology
   • Biometrics

5. 5. Name the respective sub-divisions of biology which deal with the study of insects, birds, fungi and heredity.

Solution:-

Listed below are the branches of biology which deals with the respective fields:

Study of insects – Entomology

Study of birds – Ornithology

Study of Fungi – Mycology

Study of heredity – Genetics

6. 6. Name some professions other than medicine which require a basic knowledge of Biology.

Solution:-

Medicine is a field of health and healing whereas biology is a natural science that deals with life and living entities. Listed below are few professions apart from medicine that necessitate some Biology knowledge:

6. • Lecturers
   • Pathologist
   • Microbiologist
   • Genetic engineer
   • Biotechnology engineer

C. Short Answer Type

1. 1. What is biology? Name and define its three major branches.

Solution:-

Biology is one of the major branches of science. It is a natural science which deals with study of living beings, that is to say animals, plants and even humans. Biology is derived from a Greek: ‘bios’ meaning life and ‘logos’ meaning study. Biology on the whole can be sub-divided into three major branches, namely:

1. • Botany – Botany is a branch of biology dealing with study of plants
   • Zoology – Zoology is a field of biology concerning with animal study
   • Human Biology – It deals with humans as a living entity and their relationship with other entities.

2. 2. How does Biology help us in leading a healthier life?

Solution:-

Biology is a study of living entities; hence it helps in understanding the behavioral characteristics of the living. The knowledge and study of biology has immensely helped in human health and advancement. Basic knowledge can help in self-analyzing causatives of diseases, different microbes causing diseases. Thereby examining and studying their mode of living and propagating diseases. This study has paved the way for production of new drugs synthesized naturally or synthetically killing causatives of diseases.

3. 3. A farmer and a housewife may have never studied biology, yet both of them know some of its general principles through experience. State any two principles which they know.

Solution:-

Housewives have a good knowledge of grocery – vegetables, millets, grains, fruits etc. They have an idea of the time taken to grow these crops and also about the nutritional benefits of various crops. She can suggest first hand treatment for simple cold, cough and other mild mishaps.

Although a farmer may have never studied the subject biology, he still has knowledge of crop production which is a science in itself. Right from selecting germfree seeds to sow, act of ploughing, crop plantation, using fertilizers, irrigation and its types, crop harvesting, cross-breeding with other plants, weed removal, etc, they have knowledge of basic biological concepts.

4. 4. Distinguish between the following pairs of sciences:
      1. Zoology and Entomology
      2. Genetics and Eugenics
      3. Phycology and Mycology
      4. Space Biology and Exobiology
      5. Biotechnology and Bioinformatics
      6. Embryology and Immunology
      7. Ichthyology and Pisciculture

Solution:-

Listed below are the differences between the different fields of science.

D. Long Answer Type

1. 1. Do you think Biology can help in further increasing the yield of food? If so, how?

Solution:-

Yes, Biology can help in enhancing food yield. The advancement in the field of biology and adaptation of technological principles in this field of science has paved way for newer milestones in health and life sciences. Plants and animals of newer varieties are cultivated by cross-breeding through the application of biotechnological principles, unleashing unexplored concepts for a brighter future. Implementation of these biological principles to tackle current environmental issues and breakthrough in the field of medicine has been the vision. Knowledge of science has also increased awareness of various unknown plant and animal diseases, their diagnosis and probable treatment thereby contributing to the wellness of human welfare ultimately.

ICSE Class 9 Biology Chapter 1 – Introducing Biology gives an overview of the branch of science – biology. Science is an organized body of knowledge supported by experimentation and observation that is derived from the study of natural phenomena of the whole material universe.

Biology deals with the study of living entities – animals, plants and humans. In this chapter, we learn about the fundamentals of biology, growth of biology, the diverse branches of biology that are flourishing today and the applications of biological principles in various fields.

Over the academic years, students have seen quite a few questions appearing from this chapter in the examinations which are usually the short type of questions or MCQs or in some cases, log questions have also appeared.

List of subtopics covered in Chapter 1 – Introducing Biology:

List of Exercise

Selina Solutions for class 9 Biology Chapter 1 – Introducing Biology

In this chapter, we get enlightened about the branch of biology – science. The evolution of various concepts of biology is discussed in this chapter. Pioneers in the field that organized the study of biology is also detailed.

Biology offers three major branches – botany, zoology, and human biology. The other fields of study offered by biology can also be learnt in this chapter.

The chapter finally lays out the importance and applications of various biological concepts in different fields and how the face of biology is changing with the advancement in the field of science and technology.

Key Features of Selina Solutions for class 9 Biology Chapter 1 – Introducing Biology

• Selina solutions enable students for the preparation of class 9 examinations stress-free
• Solutions have been framed from the textbook thereby aligning to the standard study material
• Tables are used wherever necessary so that students are able to remember and learn easily
• MCQs have be answered along with explanations
• True or false statements are answered along with justifications
• Solutions are answered with the help of relevant analogies