Carbon dioxide is naturally present in the atmosphere as part of the Earth's carbon cycle. Human activities are altering the car
bon cycle, by adding more CO2 to the atmosphere and by influencing the ability of natural sinks, like forests, to remove CO2 from the atmosphere. While CO2 emissions come from a variety of natural sources, human-related emissions are responsible for the increase that has occurred in the atmosphere since the industrial revolution. Consider the graph above. Notice the trend in atmospheric carbon dioxide as recorded at recording stations over Antarctica. Hypothesize how the schematic of the carbon cycle might change if urbanization and deforestation continues unchecked.
A) Both the carbon dioxide sinks and the carbon dioxide outputs will increase so the numbers should reach equilibrium.
B) The photosynthesis carbon sink will decrease in gigatons; the carbon dioxide output due to combustion will increase.
C) All of the carbon dioxide sinks will decrease in gigaton amounts; the carbon dioxide output due to combustion will increase.
D) Carbon dioxide outputs due to combustion of fossil fuels continues to increase; the rate of photosynthesis will also continue to increase to accommodate this.
Phloem is a living tissue inside the plants, where it can flow in either direction. Inside the phloem, it will have a cell, which both ends have walls with perforations. So the sugars will travel through them in both directions.
The enzymatic reactions of cellular respiration begin in the cytoplasm, but most of the reactions occur in the mitochondria. Cellular respiration occurs in the double-membrane organelle called the mitochondrion.
1.Alleles are a pair of genes that occupy a specific location on a particular chromosome and control the same trait.
<em><u>2</u></em><em><u>.</u></em><em><u>An allele is one of two or more versions of a gene. An individual inherits two alleles for each gene, one from each parent.</u></em>