Ещё раз прочитайте последний абзац и полный гафик
Origin of the species
Initially it was assumed that the polar bear separated from brown about 45-150 thousand years ago, probably in the territory of modern Ireland. However , a recent study showed that the polar bear separated from their common ancestor with brown bear 338-934 thousand years ago ( an average of 600 thousand years ago) , and 100-120 thousand years ago by crossing species representatives took their hybridization , resulting in all modern polar bears are descended from these hybrids .Appearance
Head bears. From left to right : Brown , Black, White .Polar bear - one of the largest terrestrial carnivorous mammals of Representatives . Its length is 3 m , weight up to 1 ton Usually males weigh 400-450 kg , body length of 200-250 cm, height at the withers 130-150 cm Females noticeably smaller ( 200-300 kg). The smallest bears are found on Spitsbergen , the largest - in the Bering Sea .Polar bear from other bears distinguish long neck and flat head . His skin is black. Fur color varies from white to yellowish ; summer fur may turn yellow due to constant exposure to sunlight . Polar bear fur is devoid of pigment stains, and hollow hairs . Translucent hairs allows only ultraviolet rays, giving the coat insulating properties . When ultraviolet photography polar bear seems dark . Due to the structure of the polar bear hairs can sometimes " go green ." It happens in a hot climate ( in zoos ) , when inside hairs infest microscopic algae .<span>Soles of the feet are hit wool, not to slip on the ice and not freeze. Between the fingers has a flipper and the front paws trimmed stiff bristles. Large claws can keep even a strong prey.</span>
<span>3. Philip said that they would </span><span><span>work hard the next summer.</span>
4. Nelli said that theu wer</span><span><span>e going to read that book the next month.</span>
5. Mrs Thompson said that they we</span><span><span>re going to the country the next week.</span>
6.</span><span><span> Sally said that</span> she would come back two days later.
7. </span><span><span>Peter said that t</span>hey would know everything three months later.
8. </span><span>Ann asked them if they could do it right then.
9. </span><span><span>Mike said that </span>his uncle was in India at that moment.
10. </span><span>Tom's m</span><span><span>other asked her son if he would</span> go to school the next Saturday.</span>