Answer:
Habitat destruction and degradation, inflicted as humans expand our activity further into the last wild places, is a powerful engine for extinction.
Explanation:
A pH less than 7 is acidic. A pH greater than 7 is basic. The pH scale is logarithmic and as a result, each whole pH value below 7 is ten times more acidic than the next higher value. For example, pH 4 is ten times more acidic than pH 5 and 100 times (10 times 10) more acidic than pH 6.
<span>Organisms living near hydrothermal vents have no access to light so they get their energy from chemosynthesis.
C</span>hemosynthesis<span> is the biological conversion of one or more carbon containing molecules</span><span> and nutrients into organic matter using the </span>oxidation<span> of inorganic compounds</span> or methane as a source of energy. <span>Chemosynthesis is the process by which certain microbes create energy by mediating chemical reactions.</span><span>
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Selective permeability, made possible in cells by the phospholipid bilayer that makes up the plasma membrane, is basically monitoring and regulating what can and can't enter the cell. It is carried out by a series of membrane proteins that act as channels to polar molecules, opening to allow them in and closing to prevent their entry. This is possible because the hydrophobic tails of the phospholipid molecules repel polar molecules and so prevent their entry unless through a channel.
Answer:
The correct answer is the letter D. Intensive rice cultivation
Explanation:
Subsistence agriculture is characterized by low technical level in small production units with the objective of directly feeding family members. Examples of low-intensity agricultural activities are carried out on small and medium-sized farms, usually with family labor. It occurs in low-valued areas, which do not interest commercial agriculture, however it is practiced worldwide. On the other hand, rice is the third most planted crop in the world, with approximately 160 hectares cultivated per year.
