What is the life cycle of a polar bear?
Polar Bear Life Cycle: Polar bears mate every other year in mid-summer. The female digs a den in the snow and stays there for nine moths until her young are born. She has between one and four cubs. The cubs are hairless and toothless when they are born and are about the size of a chipmunk. The cubs stay with their mother for one to two years. http://www.nhptv.org/natureworks/polar.h… Lichen Life Cycle: A lichen is a compound organism built of a fungus intimately entwined about cyanobacteria or cells of an alga. Each partner of a lichen contributes different synthetic capabilities. The cyanobacterium or algal cell, which comprises less than 10 percent of the mass of the dual organism, is vital to its survival because it can photosynthesize, capturing solar energy. The fungus secretes acids that release minerals and water from rocks. The fungus seems to benefit more from this living partnership, for it grows more slo
