07:58

Animals - the vertebrates

09:05

Medical applications of genetic engineering

08:52

Cancer

11:02

Human immunity

14:59

Plants

14:29

Agriculture - the conservation of biodiversity

00:42

Individual actions for nature conservation

01:45

Global actions for environmental protection

01:50

Restoration of the natural environment

01:28

How plants escaped from a reserve

01:01

Passive and active ecosystem conservation

01:21

Methods for flood prevention

02:21

Causes of floods

00:52

Transport systems and infrastructure

00:58

The kitchen

00:42

Room

00:32

The kitchen and bathroom

00:58

Nature as a living organism

00:38

Human activities and the transformation of ecosystems

00:55

Secondary succession in milk

00:51

Changes in biodiversity and productivity during succession

01:00

Why ecosystems change

00:45

Main stages of ecological succession

00:37

Effects of introducing new species into a biocoenosis

00:53

Secondary succession

01:07

Primary succession

00:58

Ecological succession

00:47

Balance of matter and energy in the environment

01:01

Equilibrium in the environment

01:09

Calcium carbonate cycle

01:09

Circulation of matter in the environment

00:37

Other sources of energy

01:02

Pyramids of energy and biomass

01:03

What happens to the energy stored in food

00:53

The efficiency of energy transfer

01:11

The flow of chemical energy through the food chain

00:33

Phycobilins

00:32

Carotenoids

00:59

Chlorophylls

00:36

Solar energy

00:28

How long does it take for energy to pass through an ecosystem

00:59

Flow of energy through a food chain

00:30

Desert - the poorest biome with dispersed vegetation

00:26

Steppe - a rich biome with two-layered vegetation

00:36

Tundra - a poor biome with compact vegetation

00:23

Forest - a rich biome with multi layered vegetation

00:37

Stability of biocoenoses - coral reefs

00:59

Differentiating between ecosystems

01:24

Characteristics of a biocoenosis

01:14

The ecosystem as an ecological unit

01:09

Significance of biodiversity for humans

01:02

The most endangered species

01:18

Causes of species extinction

00:59

Ecosystem diversity

01:04

Species diversity and species richness

01:48

Species diversity of salt marshes

00:54

Genetic diversity

01:03

Biodiversity

00:49

Patterns of dispersion of individuals

01:13

Sex structure of populations