mini-lectures of biology for school studentskamalakshya/cupboard/biology_1.pdfwhy to study biology?...
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Mini-Lectures of Biology For school students
ByAnkit Agrawal
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Why to study biology?● How a single tiny cell becomes a tree or a dog● To understand ourselves (How the human minds
works)● To provide confortable living● To fulfil our needs● Eradication of disease and medicine● Conservation of natural resources● Interrelationships of plants, animals & environment
(Biology tells you about different plants and their mechanism of converting CO
2 to O
2)
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Discoveries in field of biologyHippocrates (460-370 BC)Father of medicine
Aristotle (382-322 BC)Father of Biology
Theophrastus (370-287 BC)Father of Botany
G. J. Mendel (1822-1884)Father of genetics
Carolus Linnaeus (1753)Father of Plant Taxonomy
Charles Darwin (1809-1882) “Survival of the fittest”
Antony van Leeuwenhock (1632-1723) Father of Microscopy
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What is life
Life
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Branches of Biology● Chemistry of life ● The cell ● Genetics ● Mechanism of evolution● Evolutionary trees● Plant form & function● Animal form & function● Ecology
● Biochemistry● Molecular Biology● Biotechnology ● Neuroscience● Immunology ● Developmental
Biology● Microbiology● Medicine
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Concepts of Biologya) Evolution, the Overarching Theme of Biology
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Age of universe 13.8 billion years Age of earth 4.54 billion yearsFirst simple cells 3.6 billion years First complex cells 2.0 billion yearsFirst multicellular 1.0 billion years Simple animals 600 million years First mammals 200 million yearsFirst primates 60 million yearsModern humans 200,000 years
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Concepts of Biologya) Evolution, the Overarching Theme of Biology
b) Emergent properties
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Levels of Biological Organizaiton1 Biosphere
2 Ecosystem
3 Communities
4 Populations
5 Organisms 6 Organs and Organ systems
9 Organelles
7 Tissues
8 Cells
10 Molecules
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Concepts of Biologya) Evolution, the Overarching Theme of Biology
b) Emergent properties
c) Organism interact with their environments
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Concepts of Biologya) Evolution, the Overarching Theme of Biology
b) Emergent properties
c) Organism interact with their environments
d) Structure and funcitons are correlated
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Concepts of Biologya) Evolution, the Overarching Theme of Biology
b) Emergenet properties
c) Organism interact with their environments
d) Structure and funcitons are correlated
e) Cells are an organisms's basic units
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Concepts of Biologya) Evolution, the Overarching Theme of Biology
b) Emergenet properties
c) Organism interact with their environments
d) Structure and funcitons are correlated
e) Cells are an organisms's basic units
f) Continuity of life is based on heritable information in the form of DNA
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Concepts of Biologya) Evolution, the Overarching Theme of Biology
b) Emergenet properties
c) Organism interact with their environments
d) Structure and funcitons are correlated
e) Cells are an organisms's basic units
f) Continuity of life is based on heritable information in the form of DNA
g) Feedback mechanisms regulate biological systems
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