Bears Lesson 23 of the biology course of Mova's primary school: 18 sentences, each with its syntax tree and pragmatics. The lessons are written for Mova, and their agreed trees are part of Mova corpus 0.4 (CC BY-SA 4.0). How Mova does on its tests: the lesson at school .
0 There are eight kinds of bear in the world, from the huge polar bear on the Arctic sea ice to the small sun bear in the rainforests of Southeast Asia, and each one has four strong legs, a big nose and a body built around finding food. 1 Most bears eat almost anything: berries, nuts, roots, insects, fish and meat, so a grizzly at a waterfall in autumn snaps up leaping salmon to get fat before winter. 2 Then it crawls into a den and sleeps for months without eating, drinking or going to the toilet, living on that fat, and in midwinter a mother gives birth to tiny cubs about the size of a guinea pig. 3 A polar bear looks white, but each hair is see-through and hollow and its skin is black, and the giant panda eats almost only bamboo, gripping the stems with a thumb-like bump on its wrist. 4 Winnie the Pooh and Yogi Bear are friendly and steal honey and picnic baskets; real bears do raid bins and love honey, but a bear used to human food becomes dangerous, so never feed one and keep far away. 5 There are eight species of bear, and the koala is not one of them but a marsupial. 6 Polar bears are excellent swimmers that can swim for hours or even days between pieces of sea ice, and scientists class them as marine mammals. 7 A polar bear's hairs are see-through and hollow, look white and trap warmth, and its skin underneath is black; in warm zoos tiny green algae sometimes grow inside the hollow hairs and turn the fur green. 8 Polar bears wait beside breathing holes in the ice to catch seals, and can smell a seal under snow from about a kilometre away. 9 Brown bears, including grizzlies, catch salmon at waterfalls in autumn to build up fat before winter. 10 In winter, when food is scarce, many bears sleep in a den for months to save energy, living on stored fat without eating, drinking or going to the toilet, while their heartbeat slows a lot. 11 Black and brown bear cubs are born in the den in midwinter and are only about the size of a guinea pig. 12 Giant pandas eat almost only bamboo, up to about 12 to 38 kilograms a day, and grip it with an extra wrist bone that works like a thumb; their teeth and tummy are built like a meat-eater's, and bamboo gives so little energy that they eat for up to about 14 hours a day. 13 The sun bear is the smallest bear; it lives in Southeast Asian rainforests and has a tongue up to about 25 centimetres long for honey and insects. 14 Most bears are omnivores, and their sense of smell is many times better than a dog's. 15 Bears that get used to human food often become dangerous, so parks use bear-proof bins and tell visitors never to feed bears. 16 A brown bear can run about 50 kilometres an hour in short bursts, faster than the fastest human sprinter, and a mother with cubs is especially dangerous, so back away slowly and never go between a mother and her cubs. 17 The teddy bear is named after US President Theodore Roosevelt, who in 1902 refused to shoot a bear tied up on a hunt. ← previous Elephants: families, tusks, ears and memorynext → Wolves and dogs↑ back to Biology This page in Markdown → https://md.mova.elamur.ai/free/en/corpora/school/biology/23-bears/