Yes, They all are! They all can be the start of something.
Synonyms for reference point:
View, viewpoint, or maybe even perspective.
The amount of water on the planet is fixed; it neither increases or decreases. Glaciers are sheets of moving ice. This water to form these extensive sheets must come from somewhere. The water comes from the most extensive store on the planet; the oceans. Ice Ages always corresponds to periods of low sea level because much of the ocean water is is land locked as glaciers.
Answer: B. A property owner clear-cutting all of the trees on his land to sell for timber.
Explanation:
The tragedy of the commons is a problem whereby an individual pursue his or her own personal gain at the expense of the overall well-being of everyone in the society.
In this question, the tragedy of commons will be a property owner clear-cutting all of the trees on his land to sell for timber. Even though the owner makes some income for himself, this act will bring about soil erosion, depletion of resource or flood. He neglected the society in order to satisfy his own needs.
Answer:
The correct answer is - cell membrane.
Explanation:
Cell membrane or plasma membrane is the outer structure that enclosed the cell-matrix and cell organelles and acts as a barrier to the substances and things to move in or out of the cell and allows only specific substances and molecules to move in and out of the cell.
If the cell membrane is not performing its function properly it might result in blocking the various nutrients and other essential molecules to move in and metabolic substances to move out of the cell.
