Biology
Homeostasis is the condition in which the body maintains

The lowest possible energy usage
A relatively stable internal environment within limits
A static state with no deviation from preset points
A changing state within an unlimited range

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Biology
Out of 900 reported species of living gymnosperms, conifers are represented by about 500 species, About 2,50,000 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

only angiosperms
angiosperms and all gymnosperms except conifers
only conifers
all gymnosperms, except conifers

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Biology
The main function of the inner bark of a woody plant is to

Transport food from the leaves to the other parts of the plant
Protect the plant from herbivorous animals
Act as a membrane impermeable to water and gas
Transport minerals and water from the roots to the leaves

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