Platypus (presentation, project work). Order Monotremes History of the discovery of the platypus presentation

1 slide

2 slide

Echidna family ECHIDNA The echidna, a relative of the platypus, is not at all like it. She, like the platypus, is an excellent swimmer, but she does it only for pleasure: she does not know how to dive and get food under water.

3 slide

Another important difference: the echidna has a brood pouch, a pocket on its belly where it places its egg. Although the female raises her cubs in a comfortable hole, she can safely leave it - the egg or newborn cub in her pocket is reliably protected from the vicissitudes of fate. At the age of 50 days, the little echidna already leaves the pouch, but for about another 5 months it lives in a hole under the auspices of a caring mother.

4 slide

The echidna lives on the ground and feeds on insects, mainly ants and termites. Raking termite mounds with strong paws with hard claws, she extracts insects with a long and sticky tongue. The echidna's body is protected by spines, and in case of danger it curls up into a ball, like an ordinary hedgehog, exposing its prickly back to the enemy.

5 slide

WEDDING CEREMONY From May to September, mating season begins for the echidna. At this time, the female echidna is using special attention males. They line up and follow her in single file. The procession is led by the female, and the suitors follow her in order of seniority - the youngest and most inexperienced close the chain. So, in company, echidnas spend a whole month, looking for food together, traveling and relaxing.

6 slide

Family of platypus platypus A miracle beast, the platypus seems to be assembled from parts of different animals: its nose is like a duck’s beak, its flat tail looks like it was taken from a beaver with a shovel, its webbed feet look like flippers, but are equipped with powerful claws for digging (when digging, the membrane bends, and when walking, it gathers into folds without interfering with free movement). But despite all the seeming absurdity, this animal is perfectly adapted to the lifestyle that it leads, and has hardly changed over millions of years.

7 slide

At night the platypus hunts for small crustaceans, mollusks and other small aquatic life. Its tail-fin and webbed paws help it dive and swim well. The eyes, ears and nostrils of the platypus close tightly in the water, and it finds its prey in the dark underwater with the help of its sensitive “beak”. This leathery “beak” contains electroreceptors that can detect weak electrical impulses emitted by aquatic invertebrates as they move. Reacting to these signals, the platypus quickly finds prey, fills its cheek pouches, and then leisurely eats what it has caught on the shore.

Platypus (lat. Ornithorhynchus anatinus)- This oviparous mammal, one of those rare animals that make up the unique fauna of Australia.

Its body length is about 30 cm, including the tail - up to 55 cm, the weight of an adult is about 2 kg. As with many other animal species, male platypus are noticeably larger than females. Squat, with a large tail, somewhat similar to a beaver, it received its eloquent name due to its soft beak covered with elastic skin.

Its five-toed paws are perfect for both swimming in warm Australian waters and digging. For swimming, it mainly uses its front paws, which are equipped with characteristic membranes.

Platypus is a nocturnal animal, and it spends quite a large part of its life in water. Its habitat is the shores of lakes and small rivers in eastern Australia. Every year before mating season(August-November) they fall into a short hibernation for 5-10 days. They mate in water after a fairly lengthy courtship ritual. Males are polygamous.

The average lifespan of a platypus in captivity is about 10 years; its lifespan in the wild is still unknown. Some time ago, they were widely hunted for their unique fur, but at the beginning of the last century, the Australian government issued a decree banning hunting for them.

Today this species is no longer threatened with extinction, but pollution natural environment habitats and the gradual industrialization of sparsely populated areas of Australia is doing its job: platypuses are gradually becoming fewer and fewer.

In Australia, there are special reserves specially equipped for their safe residence. The most famous among them are Hillsville and West Burley.

It is known that only males have poisonous spurs on their hind legs. The poison contained in these spurs can cause severe pain to a person and kill a medium-sized animal, such as a dog.

The main characteristic of mammals, which includes the platypus, is the presence of mammary glands in animals, with the help of which they feed their offspring with milk. Platypuses do not have nipples, but they have glandular areas of skin that are capable of secreting milk through the pores (milk contains a high content of fat, sugar and protein).

The female “brings” two or three eggs, rich in yolk, leathery, with a soft shell. She lays her eggs deep in her burrow, and after 10 days the young hatch and feed on milk through the female's modified sweat glands. As mentioned above, the female does not have nipples, so it flows down the fur, from where the cubs lick it off.

It turns out that the platypus is also unique in that it has as many as 10 sex chromosomes, while other animals have only two. For example, it is known that a person’s sex is determined by a combination of X and Y chromosomes. If XX, then the result is a girl, if XY is a boy. Sex is determined in almost the same way in birds, only the chromosomes are called differently Z and W. But in platypuses, a male is born with the combination XYXYXYXYXY, and a female is born with XXXXXXXXXX. For the entire animal world, this is simply unique.

By its beak it can be said that it is a relative of a duck, by its hair it is closer to a bear, by its tail it can be attributed to a beaver, and its webbed feet are more reminiscent of those of an otter.

And until now, evolutionists have not found an explanation for the origin of platypuses; one thing is clear - this is an animal creation of hands not from this world.

General information The platypus is a waterfowl mammal of the order Monotreme, living in Australia. This is the only modern representative of the platypus family, together with echidnas it forms the order of monotremes. This unique animal is one of the symbols of Australia.

The body length of the platypus is 30-40 cm, the tail is 10-15 cm, it weighs up to 2 kg. Males are about a third larger than females. The body of the platypus is squat, short-legged; the tail is flattened, similar to the tail of a beaver, but covered with hair, which noticeably thins with age. Its fur is thick, soft, usually dark brown on the back and reddish or gray on the belly. The head is round. In front, the facial section is extended into a flat beak about 65 mm long and 50 mm wide. The beak is not hard like that of birds, but soft, covered with elastic bare skin. Down at the base of the beak, males have a specific gland that produces a secretion with a musky odor. Young platypuses have 8 teeth, but they are fragile and quickly wear out, giving way to keratinized plates. The platypus has five-fingered feet, adapted for both swimming and digging. The swimming membrane on the front paws protrudes in front of the toes, but can bend in such a way that the claws are exposed, turning the swimming limb into a digging limb. For swimming, the platypus does not use its hind legs, like other semi-aquatic animals, but its front legs. The hind legs act as a rudder in the water, and the tail serves as a stabilizer. The gait of the platypus on land is more reminiscent of the gait of a reptile - it places its legs on the sides of the body. Its nasal openings open on the upper side of its beak. The eyes and ear openings are located in grooves on the sides of the head. When an animal dives, the edges of these grooves, like the valves of the nostrils, close, so that under water its vision, hearing, and smell are ineffective. However, the skin of the beak is rich in nerve endings, and this provides the platypus not only with a highly developed sense of touch, but also with the ability to electrolocate. Electroreceptors in the beak can detect weak electric fields, which arise, for example, when the muscles of crustaceans contract, which helps the platypus in search of prey. Looking for it, the platypus continuously moves its head from side to side during underwater hunting.

Slide 1

Slide 2

Slide 3

Slide 4

Slide 5

The presentation on the topic "Platypus" (7th grade) can be downloaded absolutely free on our website. Project subject: Biology. Colorful slides and illustrations will help you engage your classmates or audience. To view the content, use the player, or if you want to download the report, click on the corresponding text under the player. The presentation contains 5 slide(s).

Presentation slides

Slide 1

Slide 2

The platypus is the only species of the family of mammals of the same name in the order Monotremes. The body length of the platypus is 30-40 cm, the tail is 10-15 cm, and it weighs up to 2 kg. Males are about a third larger than females. The body of the platypus is squat, short-legged; the tail is flattened, similar to the tail of a beaver, but covered with hair, which noticeably thins with age. In the tail of the platypus, like the Taman devil, reserves of fat are deposited. Its fur is thick, soft, usually dark brown on the back and reddish or gray on the belly. The head is round. In front, the facial section is extended into a flat beak about 65 mm long and 50 mm wide. The beak is not hard, like that of birds, but soft, covered with elastic bare skin, which is stretched over two thin, long, arched bones. The oral cavity is expanded into cheek pouches, in which food is stored during feeding. Below, at the base of the beak, males have a specific gland that produces a secretion with a musky odor.

Slide 3

The platypus feeds on small aquatic animals. It stirs up the silt at the bottom of the reservoir with its beak and catches insects, crustaceans, worms and mollusks. Underwater he feels free, if, of course, there is an opportunity to catch his breath on the surface from time to time. Diving and rummaging in the mud, he is guided mainly by touch; His ears and eyes are protected by fur. On land, the platypus, in addition to touch, is guided by sight and hearing.

Slide 4

Platypus burrows are located outside the water, including the entrance, located somewhere under the overhanging shore at a height of 1.2-3.6 m above the water level. Only an exceptionally high flood can flood the entrance to such a hole. An ordinary hole is a semicircular cave dug under the roots of trees, with two or more entrances.

Every year, the platypus enters a short winter hibernation, after which it begins the breeding season. Males and females meet in the water. The male grabs the female's tail with his beak, and both animals swim in a circle for some time, after which mating occurs.

Slide 5

Tips for making a good presentation or project report

Try to involve the audience in the story, set up interaction with the audience using leading questions, a game part, do not be afraid to joke and smile sincerely (where appropriate).
Try to explain the slide in your own words, add additional interesting facts, you don’t need to just read the information from the slides, the audience can read it themselves.
There is no need to overload the slides of your project with text blocks; more illustrations and a minimum of text will better convey information and attract attention. The slide should contain only key information; the rest is best told to the audience orally.
The text must be well readable, otherwise the audience will not be able to see the information being presented, will be greatly distracted from the story, trying to at least make out something, or will completely lose all interest. To do this, you need to choose the right font, taking into account where and how the presentation will be broadcast, and also choose the right combination of background and text.
It is important to rehearse your report, think about how you will greet the audience, what you will say first, and how you will end the presentation. Everything comes with experience.
Choose the right outfit, because... The speaker's clothing also plays a big role in the perception of his speech.
Try to speak confidently, smoothly and coherently.
Try to enjoy the performance, then you will be more relaxed and less nervous.

“Australia and Oceania” - Which ones natural resources is the country rich? (working with atlas maps). Working with atlas maps, determine features of the EGP countries according to plan. " Business card" countries. Developed by: Geography teacher of the Municipal Educational Institution “Proletarskaya Secondary School No. 2” Fedutenko T.A. Economy of Australia. Why? Features of accommodation Level of urbanization.

“Rivers of Australia” - Australia is characterized by poor development of surface runoff. Are rivers really a product of climate? Completed by 7th grade student Tolstov Nikolai MOU Podlesnaya Secondary School. The hypothesis was confirmed. Maximum average annual temperature+34оС was observed in Marble Bar. Water surprises of Australia. Rivers are a product of climate.

“Geography lesson: Commonwealth of Australia” - Purpose and objectives of the lesson: WORK IN GROUPS: 1st level. Australia – largest producer and wool exporter. Industry. The share of wool exports in the country's economy is decreasing. Conclusions. Thanks to James Cook, Australia became the property of England. Assignment: Determine the EGP of the Commonwealth of Australia using the atlas maps.

“Australia theme” - Only in the east there are small areas of ancient (420 million years ago) folding. Length 2375 km. The city of Sydney was founded as a convict colony. Temperatures in Australia increase when moving north towards the equator, rather than south. 1. History of the discovery of Australia. 2. Relief and minerals. 3. Climate and inland waters.

“Australia continent” - There are many plants and animals here that cannot be found on other continents. Indigenous. Australian merino sheep produce over half of the world's total harvest. Australia is the smallest and driest continent on our planet. Person M. Byron. G.P. - The coasts of Australia are very slightly indented. West coast of Australia.

“Natural areas of Australia” - The tallest and fastest growing tree in the world is the eucalyptus. Giant kangaroo - height - 2 m, body weight - up to 90 kg, speed - 20 -80 km / h. The bear is a very picky eater. It feeds on leaves and young shoots of certain species of eucalyptus. Birds 670 species. It feeds on worms, crayfish, and eggs. Endemic 90%.

There are 9 presentations in total