C) All variables are measured to provide data for the experimental results.
A is untrue because the independent variable will be changed to see how it changes the results.
B is untrue because the controlled variable will not be affecting the experiment because it is unchanging throughout the experiment.
D is untrue because the controlled variable will NOT be changing throughout the experiments.
<span>Chemical pollution introduces chemicals into the natural environment, negatively affecting the air, water and soil. ... Toxic releases from industrial plants into the environment and agricultural runoff can threaten water supplies. </span><span>Many of the long-lasting effects of polluting the land, such as the leaching of chemicals into the soil, cannot be easily reversed. The best way to deal with land
pollution is to keep it from happening in the first place. Stepping up
recycling efforts and preventing overuse of soil that makes it acidic
and contaminates nearby areas. </span><span>Scientists have predicted that long-term effects
of climate change will include a decrease in sea ice and an increase in
permafrost thawing, an increase in heat waves and heavy precipitation,
and decreased water resources in semi-arid regions</span>
Living things are made of types of molecules, known as macromolecules.
There are four major classes of biological macromolecules:
carbohydrates
lipids
proteins
nucleic acids
Each of these types of macromolecules performs a wide array of important functions within the cell; a cell cannot perform its role within the body without many different types of these crucial molecules. In combination, these biological macromolecules make up the majority of a cell’s dry mass. (Water molecules make up the majority of a cell’s total mass.) All the molecules both inside and outside of cells are situated in a water-based (i.e., aqueous) environment, and all the reactions of biological systems are occurring in that same environment.
Well, to determine the type of sugar that is present and serves to play an important role in the overall structure and function of this particular nucleic acid is by the fact that the strand is single stranded, and not double stranded as in DNA. The only other commonly known Nucleic acid that is single stranded is RNA. Another clue or hint that points us in the direction to state that this a polynucleotide stranded molecule of RNA, is by the presence of the nitrogenous base, Uracil. DNA in place has thymine, uracil is only found on RNA, and is complementary to thymine, if used in transcription. Basically all of this information simply points to RNA, and the sugar contained in RNA would be ribose.
<span>the focus</span><span> more correctly termed the hypocenter</span>