In North America and other large-scale industrial nations there have been major changes in the typical family during the last century. These changes include

Nuclear family households have become more common.

Extended family households have become more common.

Out of 900 reported species of living gymnosperms conifers are represented by about 500 species About 250000 species of angiosperms (flowering plants) have also been reported in the world. The vast and dominant woodlands in Europe Asia North America and mountains such as Himalayas are wooded with

all gymnosperms except conifers

angiosperms and all gymnosperms except conifers

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