Biological Diversity

1

Biodiversity and the Value of Variation

Why variety is life’s insurance policy

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2

Environmental Selection Pressures

What decides who survives

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3

Structural Adaptations

When body shape solves the problem

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4

Physiological Adaptations

The adaptations you can’t see

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5

Behavioural Adaptations

Survival by what you do

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6

Natural Selection — The Mechanism

How the environment edits life

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7

Darwin, Wallace and the Theory of Evolution

The idea that reorganised biology

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8

Evidence — The Fossil Record

Reading life’s history in rock

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9

Evidence — Biogeography

Why place shapes life

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10

Evidence — Comparative Anatomy

Same blueprint, different jobs

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11

Evidence — Embryology and Molecular Biology

Clues in embryos and DNA

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12

Speciation and Reproductive Isolation

How one species becomes two

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13

Divergent and Convergent Evolution

Splitting apart, growing alike

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14

Punctuated Equilibrium and Gradualism

Does evolution crawl or jump?

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