Clean Air Act (CAA), US Federal law, passed in 1970 and later amended, to prevent air pollution and thereby protect the ozone layer and and promote public health. The clean air act gave the federal environmental protection agency the power it needed to take effective action to fight environmental pollution. Hope this helps シ
Answer:
B ) Contain cells that connect to form pipes.
D ) Transport water and food.
Explanation:
Vascular tissue is a conducting tissue, meaning multiple cell types can be found. Their functions are to transport fluids and nutrients. To do this, they need cells that connect to form tube like pipes.
There are often not more than one or two independent variables tested in an experiment, otherwise it is difficult to determine the influence of each upon the final results. There may be several dependent variables, because manipulating the independent variable can influence many different things.
Answer:
<em>The correct option is C) Continental shelves</em>
Explanation:
The continental shelf can be described as a part of a continent which is submerged in shallow water. This shallow water is known as a shelf. Hence, the name continental shelves.
Rich deposits of oil and natural gas can be present in this part of the sea. The continental shelves are of extreme commercial significance and are a commercial site for exploitation. The continental shelves can be rich in metallic and non- metallic ores and hydrocarbon products.
<h2>Development of Plant Needles</h2>
Explanation:
- Seed of pitch pine treated with colchicine delivered tetraploid seedlings which had thick and sporadic needles and less fortunate tallness and diameter growth than ordinary seedlings.
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In test of colchicine-initiated polyploidy in pines, researcher found that a significant number of the polyploid plants returned to a diploid development in light of the fact that the polyploid cells partitioned at a more slow rate and were overwhelmed by the more quickly developing diploid cells which encompassed them.
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The primary needles of both diploid and polyploid plants were more effective at low light intensity than secondary needles, and they had lower compensation points.
