The roadless areas we have left include such irreplaceable old growth as the heart of Alaska's Tongass National Forest, where cathedral spruce and hemlock groves harbor grizzly bears and other wilderness-dependent creatures.
The role of the port of Venice in the economy of the city is central and irreplaceable.The growth of Venice and the construction of its monuments were possible in past centuries only because of the port's revenues.
Classic experiments provide illustrative examples on the relevance of the epithelial-mesenchymal cross-talk and on the irreplaceable role of growth factor as a networking bridge [ 125] for reepithelialization.
This stoichiometric need for phosphorus makes the element not only a governing factor in plant growth but an irreplaceable one.
Childhood refers not only to an irreplaceable time of individual human growth, but to the quality of those years.
These old-growth forests are irreplaceable scientific repositories, Mr. Leverett said.
Terpenoids, the largest secondary metabolic family irreplaceable in inner communication with: environment; plant growth; and development [ 16- 18], are regulated by AP2/ERF, bHLH and MYB members [ 19].
Like old-growth forests, they're few and irreplaceable and should be held in trust by everyone.
Water experts say it is about time Texans placed more value on this irreplaceable natural resource, given the state's rapid population growth and fickle weather.
To perform these in vivo explorations, optical imaging is an irreplaceable tool to assess dissemination of tumor cells in the body of xenografted mice as well as tumor growth or regression under treatment [ 2, 3].
It's literally irreplaceable.
