Criteria and structure types. (1981)

Documentary №51769, 2 parts, duration: 0:18:00
Production: Centrnauchfilm (CNF)
Director:Marjyamov M.

Topics:

Annotation:

Educational film for students. Disclose the criteria in determining the type, gives the concept of habitat, within individual activity, etc.

Reel №1

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Alternating frames with different animals.

A monkey.

A roe deer walks through the forest.

A she-wolf with cubs.

Sibilant swan, black swan, black-necked swan.

Frogs of two different species.

Frogs of the same species.

Tadpoles in the water.

The genetic criterion of the species.

The structure and composition of chromosomes of different frog species.

Species are genetically isolated from each other.

Geographical criterion of species separation.

Frog species and its range.

In the case of the coincidence of areas, the difference in lifestyle, the so-called ecological criterion, separates.

Grass frog.

She spends most of her life on land, laying eggs in the water.

The pond frog lives only in water.

Stages of life of frogs.

The cycle time may not be the same for different frogs.

The pond frog lays eggs in warm reservoirs, and the grass frog does it earlier.

There are species that have the same breeding time, but they differ in behavior.

Squeakers.

Outwardly, different types of pisces are similar and the halos partially overlap.

The difference is the behavior of males during the mating season.

The pose of the male Altai pika.

The pose of the male of the Daurian pipit.

The pose of a male steppe pipit.

So isolation in time, in space and behavioral has led to genetic isolation.

Most often, their external difference or morphological criterion is used to recognize species.

The bright belly of the zherlyanka scares away enemies and is a characteristic feature.

Not only the appearance of the animal is studied, but also the structure of internal organs, blood composition, respiratory intensity and everything related to physiology and biochemistry.

Usually, differences are not enough to determine their belonging to a particular species by one criterion.

Therefore, everything is used together.

Each species consists of individuals.

This water shrew is a cooter.

Two shrews of kutora are fighting for their territory.

Red vole.

Her task is to protect the possessions of the whole family.

The male's glands, with which he marks his territory.

The male met the stranger.

The fight of male voles.

A characteristic pose of aggression for this type

Key words

Kinds.
Criteria.
Genetics.
Behaviour.

Calendar: 1981

Reel №2

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Snail.

There are a lot of snails on the grass.

A species cannot consist of one individual or one family.

All organisms create groups.

The group of snails is fickle.

Frogs have the same group.

In spring, frogs can be seen in different places of the pond, but in general the group is constant.

Frogs among the eggs.

Eggs.

Tadpoles.

A grouping of individuals united by a common territory during the breeding period for a long time is called a population.

A species may consist of several populations.

Once upon a time, all these amphibians had a common ancestor.

Stegocephals descended from brush-finned fish, and modern amphibians descended from them.

Evolution has been going on for millions of years.

Climate, soil, riverbeds and geological catastrophes separated populations, which, changing, formed new species.

Each of the species follows its own evolutionary path.

The species is the basis and result of evolution.

The variety of species is our wealth.

Each species is unique, because it has only its inherent combination of genes.

The Red Book of the Animal World.

An image of extinct species.

The Red Book of the USSR.

Drawings of endangered animal species.

A shrew on a man's arm.

Scientists are studying wild animals.

Filming the behavior of animals on a movie camera.

Animal artist.

The artist's drawings.

Alternating shots with wild animals.

Key words

Nature.
Kinds.
Evolution.

Calendar: 1981

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