What are 3 interesting facts about polar bears?
What are 3 interesting facts about polar bears?
Top 10 facts about polar bears
- Polar bears are classified as marine mammals.
- Polar bears are actually black, not white.
- They can swim constantly for days at a time.
- Less than 2% of polar bear hunts are successful.
- Scientists can extract polar bear DNA from just their footprints.
- They face more threats than climate change.
How do polar bears maintain homeostasis?
Thermoregulation. Body temperature, which is normally 37°C (98.6°F), is maintained through a thick layer of fur, a tough hide, and an insulating fat layer (up to 11 cm or 4.5 in. thick). This excellent insulation keeps a polar bear warm even when air temperatures drop to -37°C (-34°F).
What is homeostasis snake?
Snakes and other ectotherms are cold-blooded animals that lack the ability to generate body heat internally. Also known as poikilotherms, these animals must rely entirely on external sources to regulate their body temperature, both to stay warm and to avoid becoming overheated.
How are plants adapted to the polar environment?
ADAPTATIONS FOR A POLAR ENVIRONMENT. During the short polar summer, plants use the long hours of sunlight to quickly develop and produce flowers and seeds. Flowers of some plants are cup-shaped and direct the sun’s rays toward the center of the flower. Dark-colored plants absorb more of the sun’s energy.
Why do ginkgo trees have an irregular shape?
The interplay between these two types of branches accounts for the more irregular shape of the older trees. Branching appears to be controlled by the distribution of auxin, a naturally occurring plant hormone. The trunk diameters of the older specimens of Ginkgo may become large as a result of secondary growth.
How many segments does a Ginkgophyte leaf have?
There is one type of ginkgophyte leaf in the fossil record that is generally regarded as a distinct form and is given the generic designation Baiera. The leaf is deeply lobed into four segments and lacks a stalk (petiole).
How are polar bears adapted to live on sea ice?
The polar bear’s life cycle is closely tied to sea ice. Polar bears rely on the ice to travel, hunt seals, breed, and in some cases, den. Scientists believe polar bears are unlikely to survive if ice-free periods exceed their fasting ability (220 days), especially in areas that lack alternate marine mammal prey.
