Family Ursidae by Sarah Robinson https://padlet.com/sr000/fljboesjpx7k (Bears) en-us 2018-05-29 15:11:17 UTC 2025-11-22 15:15:28 UTC hello@padlet.com Major Characteristics sr000 https://padlet.com/sr000/fljboesjpx7k/wish/264285308
  • Elongated crushing pre-molar and molar teeth
  • Heavy limbs
  • Claws
  • Typically solitary
  • Nocurnal , but may be active during the day a well
  • Generally take shelters in caves and hollows
  • Polar bears are excellent swimmers
  • Hibernate in winter 
  • Omnivors
  • May eat fruits and insect larvae
  • Eat vertebrates when they can, honey, seeds, nuts, tubers, fish, and eggs.
  • Polar bears are the most carnivorous species, preying mainly on seal species, but including fish, small mammals, birds and their eggs, and will scavenge carcasses of whales, walruses, and seals
  • The Bears diet depends on its habitat

    • ]]>     2018-05-29 15:17:54 UTC https://padlet.com/sr000/fljboesjpx7k/wish/264285308     Giant Pandas sr000 https://padlet.com/sr000/fljboesjpx7k/wish/264289173
    1. Habitat: Inhabiting bamboo forests in the mountains of central China
    2. Physical Characteristics: Black and white, bulky body, round face
    3. Behavioral Characteristics: Must eat 26-86 lbs of bamboo daily. Very solitary, typically eats and and roaming


    ]]>     2018-05-29 15:29:24 UTC https://padlet.com/sr000/fljboesjpx7k/wish/264289173     Polar Bears sr000 https://padlet.com/sr000/fljboesjpx7k/wish/264290013
  • Habitat; large range in the arctic circle, cold areas
  • Physical Characteristics: extremely large (772-1433 lbs), around 9-10 ft long, slender bodies, a long head and neck, color: pure white- light brown, hind limbs are longer and stronger, 
  • Behavioral Characteristics: Hunt, mate, and den.  Strong swimmers, do not hibernate in winter, quite solitary other than mating and caring for cubs in early life.  
    • ]]>     2018-05-29 15:31:44 UTC https://padlet.com/sr000/fljboesjpx7k/wish/264290013     Sun Bear sr000 https://padlet.com/sr000/fljboesjpx7k/wish/264290755
  • Habitat: Tropical forest of SE Asia.  
  • Physical Characteristics:   4.5 ft long, 100 lbs, short sleek black fur with an orange/yellow horse shoe shape color on chest, have loose skin, strong legs,  long tongue. 
  • Behavioral Characteristics Solitary, excellent climbers, claws and canine teeth for protections, love honey
    • ]]>     2018-05-29 15:33:59 UTC https://padlet.com/sr000/fljboesjpx7k/wish/264290755     How Taxonomy Alone Can Give Information Regarding the Relatedness of Different Species sr000 https://padlet.com/sr000/fljboesjpx7k/wish/264292544
    The taxonomy classification can give information regarding the relatedness of different species by telling how similar the different levels of taxonomy are. For example all of the bears have the same kingdom, phylum, class, order, and family, but different genus and species, showing they are very close in relation.

    ]]>     2018-05-29 15:39:21 UTC https://padlet.com/sr000/fljboesjpx7k/wish/264292544     Fossils sr000 https://padlet.com/sr000/fljboesjpx7k/wish/264296189
  • Name of fossil: South American Short-Faced Bear
    • Largest bear fossil found 

    500,000 - 2 million years old

    Found in Quaternary period


    ]]>     2018-05-29 15:51:42 UTC https://padlet.com/sr000/fljboesjpx7k/wish/264296189     Fossils sr000 https://padlet.com/sr000/fljboesjpx7k/wish/264567685 1. Name of fossil: ancestor of modern bears
    Found in tertiary period

    Found 3.5 MYA

    This fossil had severe cavities and was found in Canada


    ]]>     2018-05-30 15:48:52 UTC https://padlet.com/sr000/fljboesjpx7k/wish/264567685     Fossils sr000 https://padlet.com/sr000/fljboesjpx7k/wish/264568422 Polar Bear Fossil
    110,000-130,000 years old

    Found in Quaternary Period

    A jaw bone found , possibly from a female polar bear

    ]]>     2018-05-30 15:51:33 UTC https://padlet.com/sr000/fljboesjpx7k/wish/264568422     Fossils sr000 https://padlet.com/sr000/fljboesjpx7k/wish/264569570
  • Name of fossil:Pygmy
  • From 2-3 MYA

    • ]]>     2018-05-30 15:55:39 UTC https://padlet.com/sr000/fljboesjpx7k/wish/264569570     Fossils sr000 https://padlet.com/sr000/fljboesjpx7k/wish/264570338 Cave bear fossil
    24,000 years old 

    ]]>     2018-05-30 15:58:31 UTC https://padlet.com/sr000/fljboesjpx7k/wish/264570338     Embryology sr000 https://padlet.com/sr000/fljboesjpx7k/wish/264571485 Giant Panda Embryo ]]> 2018-05-30 16:02:54 UTC https://padlet.com/sr000/fljboesjpx7k/wish/264571485 Embryology sr000 https://padlet.com/sr000/fljboesjpx7k/wish/264572095 Polar Bear Embryo]]> 2018-05-30 16:05:18 UTC https://padlet.com/sr000/fljboesjpx7k/wish/264572095 Embryology sr000 https://padlet.com/sr000/fljboesjpx7k/wish/264572316 Both embryo’s look almost the same, but the nose of the polar bear embryo is longer than the pandas , which makes sence because naturally polar bears have longer snouts.  

    ]]>     2018-05-30 16:06:11 UTC https://padlet.com/sr000/fljboesjpx7k/wish/264572316     Anatomy sr000 https://padlet.com/sr000/fljboesjpx7k/wish/264573064 Both Bears and many other species in the Animal Kingdom have a similar forearm structure. Animals in the Felidae family and the ursidea family have a similar structure for forearms.  While animals like cheetahs in the felidea family use these forearms for speed when running animals like the sun bear in the ursidea family use their strong forearms for climbing.  ]]> 2018-05-30 16:08:36 UTC https://padlet.com/sr000/fljboesjpx7k/wish/264573064 Microevolution sr000 https://padlet.com/sr000/fljboesjpx7k/wish/264573596 Scientists have investigated nucleotide sequences of the mitochondrial DNA control region to describe natural genetic variations and to assess the relationships between sub populations of the brown bear Ursus arctos on Hokkaido Island, Japan. They use the polymerase chain reaction product-direct sequencing technique.  Most of the phylogenetically close haplotypes within each group were distributed geographically close to each other.  Such mitochondrial DNA divergence in each group could have occurred after the brown bears migrated from the continent to Hokkaido and became fixed in the different areas.]]> 2018-05-30 16:10:12 UTC https://padlet.com/sr000/fljboesjpx7k/wish/264573596 DNA sr000 https://padlet.com/sr000/fljboesjpx7k/wish/264574705 There are studies being preformed that is showing a relation between polar bears and brown bears.  It is believed that at the end of the last ice age, a population of polar bears were stranded by the receding ice on a few islands in southeastern Alaska. Male brown bears swam across to the islands from the Alaskan mainland and mated with female polar bears, eventually transforming the polar bear population into brown bears.  The findings revealed ideas about the evolutionary history of the two species, which are closely related and known to produce fertile hybrids.]]> 2018-05-30 16:13:20 UTC https://padlet.com/sr000/fljboesjpx7k/wish/264574705 Geographic Isolation sr000 https://padlet.com/sr000/fljboesjpx7k/wish/264814814 It is believed that all bears started around the same area but soon parted. Now different species of bear are found in different areas of the world, with different traits. For example polar bears are able to survive in the arctic areas while pandas area more equipped for a cool wet forest area. ]]> 2018-05-31 15:18:16 UTC https://padlet.com/sr000/fljboesjpx7k/wish/264814814 Divergent evolution sr000 https://padlet.com/sr000/fljboesjpx7k/wish/264816641 There is a strong ancestral gene flow between the black bear and the ancestor to polar, brown and American black bear explains uncertainties in reconstructing the bear phylogeny. Gene flow across the bears may be mediated by intermediate species such as the geographically brown bears leading to large amounts of phylogenetic conflict. The isolation of the ursidae family maintain species divergence in the face of gene flow. ]]> 2018-05-31 15:24:51 UTC https://padlet.com/sr000/fljboesjpx7k/wish/264816641 Punctuated Equilibrium sr000 https://padlet.com/sr000/fljboesjpx7k/wish/264818753 It is concluded that polar bears split off from brown bears between 343,000 and 479,000 years ago.  That may seem like a long time, but it is just a blink of an eye for evolution. The most distinctive polar bear genes include many related to fat processing and to the development of the heart and circulatory system.  There evolution of the ursidae family is quite complex, and not totally figured out, but it is believed that with the two species separating and interbreeding multiple times, created the split into multiple species due to the isolation. ]]> 2018-05-31 15:32:50 UTC https://padlet.com/sr000/fljboesjpx7k/wish/264818753 Darwin's Theory of Descent with Modification and Natural Selection sr000 https://padlet.com/sr000/fljboesjpx7k/wish/264820847 Over the years the bear species has changes into many different species. The Polar bear species, for example, has gone through decent with modification. The color of the bear fur has been changing, while some bears are more yellow and some are pure white. Also polar bears diverged from a common ancestor from all bears, but evolved to have a longer head. Both of these traits are the selected trait because they help survival. Bears with more narrow heads are able to reach down in seals air holes in the ice to obtain food. As well as pure white fur because those with pure white fur are able to hide from predators. ]]> 2018-05-31 15:40:53 UTC https://padlet.com/sr000/fljboesjpx7k/wish/264820847 Phylogenetic Tree sr000 https://padlet.com/sr000/fljboesjpx7k/wish/265051895 2018-06-01 15:12:44 UTC https://padlet.com/sr000/fljboesjpx7k/wish/265051895 Cheetah Skeleton sr000 https://padlet.com/sr000/fljboesjpx7k/wish/265057277 2018-06-01 15:38:59 UTC https://padlet.com/sr000/fljboesjpx7k/wish/265057277 Bear Skeleton sr000 https://padlet.com/sr000/fljboesjpx7k/wish/265057528 2018-06-01 15:39:54 UTC https://padlet.com/sr000/fljboesjpx7k/wish/265057528