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Генетические процессы в популяциях. Видеоурок по биологии 11 класс

Генетические процессы в популяциях. Видеоурок по биологии 11 класс

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видеоурок по биологии

видеоурок по биологии 11 класс

видеоурок Развитие жизни в кайнозойскую эру

биология 11 класс Развитие жизни в кайнозойскую эру

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hello the topic of our lesson is

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those lives in the Cenozoic

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iru the

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Cenozoic era began 65 million

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years ago and currently lasts

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it is divided into two periods the

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Tertiary and Quaternary period

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in the Tertiary period the

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continents and oceans

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acquired their modern shape the

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climate was humid and warm the

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formation of the Alpine

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folding

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was completed Caucasian Himalayan

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Alpine mountains The

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Quaternary period

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lasts only two million years,

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it is characterized by periods of cold snaps

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and glaciations that did not exist in the Tertiary

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in the Cenozoic era, the

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flowering of angiosperms occurs,

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gymnosperms now dominate only in the

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tree layer of coniferous forests, the

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diversity of flowers and fruits of

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angiosperms

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led to a wide variety of

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insects that pollinate and

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eat, the

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classes of

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hard-winged and hymenopteran

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insects are the most developed;

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the fruits of plants and numerous

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insects greatly expanded the food supply of

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birds;

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these animals required a lot of food to

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ensure flight;

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birds became the most evolutionarily successful

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class of the Cenozoic era; their diversity;

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numbers grew very quickly;

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flightless became widespread; and swimming birds in some

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endemic areas,

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for example, New Zealand, birds are the

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dominant group of vertebrates, they

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even occupy the ecological niches of

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mammals;

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mammals became the second dominant class of vertebrates;

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their primitive ancestors

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arose in the Mesozoic era as

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small warm-blooded predators or omnivores

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by the beginning of the Cenozoic era for feeding

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Insectivores from

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modern animals were introduced, these include hedgehogs

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and shrews, but then the

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specialization of mammals began to a

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variety of ecological lowers small and

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large herbivorous predators omnivorous

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scavengers appear ancestors of ungulates

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predatory rodents primates and proboscideans

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the most evolutionarily successful order of

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mammals

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these are rodents, the development of primates is especially important for us

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from the insectivorous ancestors,

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representatives of primates followed the path of

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development of higher nervous activity; the

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development of grasping limbs also

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played a significant role in the formation of

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primates; the further evolution of these

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animals led ultimately to the

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emergence of man;

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since man appeared only in the

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Quaternary period of the Cenozoic era,

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he found nature already in the present In its form,

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only some species contemporaries

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of man have become extinct by now,

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for example, the cave bear or mammoth, the

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water

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is dominated by bony fish,

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cartilaginous fish occupy only some

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ecological niches, although such

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perfect cartilaginous fish as sharks are

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still very successful, it is in the

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Cenozoic that the

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largest shark,

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Carcharodon Megalodon, appears died out

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relatively recently some

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mammals also master the aquatic

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environment this is how cetaceans and

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pinnipeds appear cetaceans and dolphins

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sperm whales become the largest

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inhabitants of the oceans

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despite the obvious morphological

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convergence with fish

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streamlined torso fins loss of

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hind limbs they have retained the

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physiology of mammals they have a

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light 4-dimensional heart the uterus in the

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Cenozoic era

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develops gastropods,

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which are well adapted to both land and

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fresh and salt water bodies, cephalopods

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and valve mollusks are experiencing

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some decline, echinoderms and

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coelenterates retained their positions,

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but the number of

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echinoderms crinoids, which were

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the basis of the landscape, has greatly decreased.

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destroyed

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other echinoderm sea urchins,

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whether the bodies that exist today

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acquired the ability to move in

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this way into captivity of the Azov earl,

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which continues and today

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is dominated by mammals and birds that

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occupy the ecological niches of extinct

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reptiles

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in the water, bony

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fish dominate,

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man appears and evolves,

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this is the end of our lesson

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