What must the Polar do to survive and reproduce?

Polar bears need an average of 4.4lb of fat per day to contain energy to survive. Those bears eat ringed seals and fish to survive. Polar bears have thick fur coats that help keep them keep warm in the cold to survive too. They have a layer of fur near to the skin and an outer layer of longer fur to keep themselves warm in the icy environment they live in. The inner layer isolates them against the cold. The skin underneath their fur is black and absorbs the heat from sunlight, helping them stay even warmer. Polar bears are would to sleep in pits which they dig into gravel ridges or sand to stay themselves warm and their cubs. Female bears need a male bear to reproduce. Once paired, the male and female stay together for a week or more then, reproduce.

Explanation:

Polar bears live in one of the planet's coldest environments and depend on a thick coat of insulated fur, which covers a warming layer of fat. Fur even grows on the bottom of their paws, which protects against cold surfaces and provides a good grip on ice.

Females den by digging into deep snow drifts, which provide protection and insulation from the Arctic elements. They give birth in winter, usually to twins. Young cubs live with their mothers for some 28 months to learn the survival skills of the far north. Females aggressively protect their young, but receive no help from their solitary male mates. In fact, male polar bears may even kill young of their species. female Bears need a male bear to produce. Once paired, the male and female stay together for a week or more, then reproduce. this is the way of reproducing .

enzyme active site and substrate specificity

enzymes bind with chemical reactants called substrates. there may be one or more substrates for each type of enzyme, depending on the particular chemical reaction. in some reactions, a single-reactant substrate is broken down into multiple products

the dna molecules have a negative charge because of the phosphate groups in their sugar-phosphate backbone, so they start moving through the matrix of the gel towards the positive pole. power is turned on and dna fragments migrate through gel (towards the positive electrode).

explanation: