Answer:
It has a semi permeable membrane.
The Earth Summit is also known as Rio de Janiero de Earth Summit, it is one of the major United Nations Conference and was held last June 3-4, 1992. There were:
1. 172 governments who participated
2. 2,400 non-governmental organizations
3. 17, 000 people at the parallel NGO
Gross primary productivity (GPP) is the rate at which - E: producers convert radiant energy into chemical energy
Gross primary productivity, or GPP, is the rate at which light energy or radiant energy is used to form and store chemical energy in sugar molecules during photosynthesis.
- Producers use stored chemical energy for metabolism and cellular respiration for growth and development.
- amount of living organic material is supported by a particular ecosystem.
- the energy produced per unit area over a given time span
Thus, Gross primary productivity (GPP) is the rate at which - E: producers convert radiant energy into chemical energy
Learn more about photosynthesis:
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This
reserve is home to terrestrial and marine mammals, including grizzly
and polar bears, caribou, wolves, and wolverine as well as beluga and
bowhead whales, walrus, and several species of seals. It was
established for the purpose of preserving unique wildlife,
wilderness, and recreational values.
The
most complex level of organizational hierarchy in the Arctic National
Wildlife Refuge that is preserved is every ecosystem in the area.
I
hope it helps, Regards.
Weather refers to short term atmospheric conditions while climate is the weather of a specific region averaged over a long period of time. Climate change refers to long-term changes.