· In an open system matter and energy can be transferred
· In a closed system only energy can be exchanged
· In an isolated system neither matter nor energy can be exchanged
· The cell has to be an open system because it needs to exchange matter and energy and the only way to do so is through an open system
· As an open system the cell allows nutrients to enter the cell and waste products to exit the cell
· The cell does this through the use of a semi-permeable membrane
· It needs nutrients in the forms of glucose, ions and many other molecules.
· The nutrients can come into the cell through either passive or active transport
· In passive transport the nutrients naturally move from a higher concentration gradient to a concentration gradient.
· During active transport the particle need to move against the concentration gradient. To do this the cell needs energy to transport the materials. The energy comes in the form of ATP.
Answer:
Coasts are sensitive to sea level rise, changes in the frequency and intensity of storms, increases in precipitation, and warmer ocean temperatures.
Explanation:
Explanation:
Genetic variation refers to the difference in the genetic material of the offspring compared to their parent. The changes in gene occur as a result of the natural selection pressure and the new combination of sequences is formed in the gene in individuals.
The individuals with variation are then selected by nature based on the basis of how much these genetic variations prove beneficial:
1. The new combination of sequence could allow the population to adapt to the new environment
2. The new combination can allow the population to survive and when the population survives then the reproduction rate of population increases.
He needed to understand the concept of science to understand why it’s so important
Answer:
Nitrogen
Explanation:
nitrogen, which accounts for about 78% of the mass of dry
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