If pills are taken every day at the same time, and each pack is started on time, oral contraceptives are 99% effective in preventing pregnancy. On average, oral contraceptives are 93-97% effective because women often miss pills or do not start a new pack on time.
Kangaroos are large marsupials that are found only in Australia. They are identified by their muscular tails, strong back legs, large feet, short fur and long, pointed ears.angaroos are the only large animals that hop as a primary means of locomotion. Their springy hind legs and feet are much stronger and larger than their arms (or forelimbs). According to the San Diego Zoo, kangaroos can cover 15 feet (7 m) in a single hop and can hop as fast as 30 mph (48 kph).
The ancestors of tree kangaroos eventually headed back up into the foliage and they are now the largest tree-dwelling mammals in Australia. Tree kangaroos live in lowland and mountainous rainforests in Papua New Guinea, Indonesia and the far north of Queensland, Australia.any tree kangaroo species are incredibly rare and most are decreasing in number. These animals represent an interesting divergence in the evolution of Macropodsâthe family of marsupials that includes kangaroos and wallabies.