IB Biology D4.1 Definitions

This page contains our IB Biology definitions for D4.1. By learning each one of these definitions, you will fully cover the content for IB Biology 'Further natural selection'.

All Topic 4 Sub-topics

A4.1: Evolution & Speciation

(HL)A4.1: Further speciation

A4.2: Conservation Of Biodiversity

B4.1: Adaptations

B4.2: Ecological Niches

C4.1: Populations & Communities

C4.2: Energy & Matter Transfer

D4.1: Natural Selection

(HL)D4.1: Further natural selection

D4.2: Stability & Change

(HL)D4.2: Ecological stability

D4.3: Climate Changes

(HL)D4.3: Further climate change

gene pool

All the genes and their different alleles present in an interbreeding population

Next Up

You have completed the topic 4 definitions for IB Biology - continue with related resources below or explore the full IB Biology course from the IBO.

Explored IB Biology Definitions?

Get stuck into one of our other subjects!

Other subjects' Definitions

Chemistry

Physics

Join 85,000 students, across 130+ countries, in 500+ IB schools. That's half of the IB science graduates worldwide.

Start a 7d free trial