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Chapter 1

Introducing Biology

Class 9 - Concise Biology Selina


Multiple Choice Type

Question 1

Choose the most appropriate option in the following statements.

Palaeontology is the study of

  1. embryos
  2. blood
  3. classification
  4. fossils ✓

Question 2

Choose the most appropriate option in the following statements.

Clones of animals are being produced through the practice of

  1. genetics
  2. ecology
  3. embryology
  4. biotechnology ✓

Name the following

Question 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

Answer

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

Fill in the blanks

Question 1

Bioengineering deals with making artificial Joints and Limbs

Question 2

Genome is the entire DNA sequence of an organ.

Question 3

Silk is produced by rearing Silkworm

Question 4

Evolution deals with the study of Descent and origin of organisms.

Question 5

Organisms which draw food from the host body are called Parasites

Question 6

Animals which give birth to young ones are known as Viviparous

Question 7

Hippocrates is called the Father of Medicine.

Match the following

Question 1

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

Column AColumn B
IchthyologyViruses
OrnithologyFishes
EcologyBirds
VirologyCells
HerpetologyDiseases
PaleontologyFossils
CytologySnakes
PathologyEnvironment

Answer

Column AColumn B
IchthyologyFishes
OrnithologyBirds
EcologyEnvironment
VirologyViruses
HerpetologySnakes
PaleontologyFossils
CytologyCells
PathologyDiseases

Very Short Answer Type

Question 4

Name any two borderline sciences which are connected with Biology.

Answer

The two borderline sciences connected with biology are-

  1. Biotechnology
  2. Biometrics

Question 5

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

Answer

The following branches of biology deal with respective fields-

  1. Study of insects – Entomology
  2. Study of birds – Ornithology
  3. Study of Fungi – Mycology
  4. Study of heredity – Genetics

Question 6

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

Answer

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

  1. Lecturers
  2. Pathologist
  3. Microbiologist
  4. Genetic engineer
  5. Biotechnology engineer

Short Answer Type

Question 1

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

Answer

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 two Greek words: '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

  2. Zoology — Zoology is a field of biology concerning with animal study

  3. Human Biology — It deals with humans as a living entity and their relationship with other entities.

Question 2

How does Biology help us in leading a healthier life?

Answer

Knowledge of biology has greatly helped us in the field of human health. It provides to individuals and society, the knowledge that enables us to live a proper life. 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.

Question 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.

Answer

A farmer, although has never studied biology, knows by his experience how to increase his produce. He knows how to plough and plant crops and select good quality seeds for sowing. 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.

A housewife, by using her experience knows which fruit or vegetable to grow and how much time. She knows all the nutritional values of various foodstuffs. She can suggest first hand treatment for simple cold, cough and other mild mishaps. She knows to tame some useful animals like cow, goat and dog for her maximum benefit.

Question 4a

Distinguish between Zoology and Entomology

Answer

ZoologyEntomology
It is the study of animalsIt is the study of insects

Question 4b

Distinguish between Genetics and Eugenics

Answer

GeneticsEugenics
It is the science of passing body characteristics from parents to their offspring which includes both differences and similarities.It is a science aiming at improving human race via controlled heredity.

Question 4c

Distinguish between Phycology and Mycology

Answer

PhycologyMycology
It deals with scientific study of algaeDeals with the study of fungi

Question 4d

Distinguish between Space Biology and Exobiology

Answer

Space BiologyExobiology
It is a field of study concerning the survival problems of things that are living in outer space.Relatively a newer field of science that considers the study of life away in the universe.

Question 4e

Distinguish between Biotechnology and Bioinformatics

Answer

BiotechnologyBioinformatics
Usage of microbes or living cells in technology and industry.It is the analysis and management of biological data that is assembled in databases.

Question 4f

Distinguish between Embryology and Immunology

Answer

EmbryologyImmunology
It is a field of biology that deals with the embryo development in animals and plants.It is a science dealing with the process and causative of immunity(defend against/resist diseases)

Question 4g

Distinguish between Ichthyology and Pisciculture

Answer

IchthyologyPisciculture
It is concerned with study of fishes.It deals with the technique of growing fishes.

Long Answer Type

Question 1

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

Answer

Yes, Biology can help in further increasing the yield of food. New varieties of plants and new breeds of cattle, poultry, etc. are being developed with the knowledge of Biology. The science has also increased our knowledge of diseases of plants and animals, and how to cure them. Plants and animals of newer varieties are cultivated by cross-breeding through the application of biotechnological principles, unleashing unexplored concepts for a brighter future. All these efforts are helping us to produce more food in fields, dairies and poultry farms.

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