Можете написать небольшой текст про симбиоз простейших с другими животными,

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danilejik

Английский язык

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ответ:

some have lifelong relationships with other organisms, called symbiotic relationships. there are three different types of symbiotic relationships: mutualism, commensalism, and parasitism.

1) mutualism: both partners benefit. an example of mutualism is the relationship between the egyptian plover and the crocodile. in the tropical regions of africa, the crocodile lies with its mouth open. the plover flies into its mouth and feeds on bits of decaying meat stuck in the crocodile’s teeth. the crocodile does not eat the plover. instead, he appreciates the dental work. the plover eats a meal and the crocodile gets his teeth cleaned. coincidentally, the egyptian plover is also known as the crocodile bird.

2) commensalism: only one species benefits while the other is neither helped nor harmed. for example, remora fish are very bony and have a dorsal fin (the fin on the back of fish) that acts like a suction cup. remora fish use this fin to attach themselves to whales, sharks, or rays and eat the scraps their hosts leave behind. the remora fish gets a meal, while its host gets nothing. selfish, sure, but neither gets hurt.

3) parasitism: one organism (the parasite) gains, while the other (the host) suffers. the deer tick is a parasite. it attaches to a warmblooded animal and feeds on its blood. ticks need blood at every stage of their life cycle. they also carry lyme disease, an illness that can cause joint damage, heart complications, and kidney problems. the tick benefits from eating the animal's blood. unfortunately, the animal suffers from the loss of blood and nutrients and may get sick.

arinasuykova

Английский язык

4,5(89 оценок)

Environmental problems have become one of the most urgent problems of modern society. more and more people suffer from air and water pollution. nature also suffers from land and nuclear pollution. the reasons for such environmental problems are numerous. among them increasing number of cars in the streets, factory waste, millions of cut down trees, destroyed habitats of animals, contaminated rivers and seas. . all these problems mainly arise due to human careless activities and gradually destroy our planet. if we look closely, we’ll notice that not only one city is under danger, but the majority of world population. fortunately, there are many ways to suspend these problems. if everybody starts caring about the planet we live on, many environmental problems can be solved. . for example, if we start recycling paper and cardboard, we can save lots of trees. if we start using public transport more than private cars, we can have less air pollution. local governments can also help to prevent some problems, if they forbid logging companies to destroy the forests, or stop factories from polluting water. . the most important thing is, of course, to start acting immediately, otherwise we might have to face many global disasters.