They change every year;

They live from 2 to 3 years;

They live from 6 to 9 years;

They live during the plant’s life;

They live more than 10 years.

mosses;

ferns;

gymnospermae;

flowering plants;

algae.

have a body in the form of thallus;

have a root, a stalk and a leaf;

reproduce by spores;

are fertilized in water;

have a flower with easy perianth.

A tulip;

A juniper;

A maple;

A larch;

A pine-tree.

They are capable to live in negative ecological conditions;

They are capable to absorb different substances from environment;

They indicate pollution of atmosphere and ground;

They live in the depleted grounds;

They die by the air pollution.

Its leaves have the cellular nervation;

Its seeds are inside the fetus;

It has a flower that is an organ of sexual reproduction;

It has bright and attracted attention of insects flowers;

It has the double fertilization.

A poplar;

A larch;

A lichen;

A moss;

A pine-tree.

Water;

Gases;

Fats;

Dust;

Trace elements.

A lettuce;

An embalmed poplar;

A pine-tree;

A clover;

A yellow acacia.

Phytonzides;

Pheromones;

Freons;

Dioxins;

Poisons.

Foalfoot, dog-rose, salsify, potatoes, sow-thistle;

Salsify, sow-thistle, dog-rose, potatoes, foalfoot;

Dog-rose, foalfoot, sow-thistle, salsify, potatoes;

Salsify, potatoes, foalfoot, sow-thistle, dog-rose;

Foalfoot, potatoes, sow-thistle, salsify, dog-rose.

Definite concentration of is necessary for the normal organism functioning;

Definite ratio between absorbed trace elements is necessary for the normal organism functioning;

Definite forms of joining that have trace elements in habitat is necessary for the normal organism functioning;

Optimal meaning of abiotic factors is necessary for the normal organism functioning;

A plant stops developing normally by plenty or one factor.

Delay and stopping of growth;

Small-leaves, rosette and defoliation – of trees;

Chlorosis – of maize;

Leaves’ pairing – of tomatoes;

Leaves’ mottling of citrus plants.

Moisture;

Wind;

Light;

Air;

Features of ground.

Climate;

Animals;

Ground type ;

Relief;

A human.

Reconstruction of burnt forest;

Obliteration earlier lifeless sands;

Plants’ settling on the roof of village house;

Plants’ settlement of the railway embankment;

Obliteration of cutting.

Trees;

Bushes;

Lichens;

Perennial herbs;

Mosses.