The Montreal Protocol agreement helped to reverse ozone depletion.
Answer: Option B
Explanation:
The stratospheric ozone layers safeguards the Earth against harmful ultraviolet radiation which cause skin cancers and cataracts to humans, as well as physiological hazard to animals and all plants.
With the increase in signs of ozone depletion, government has ratified the Montreal Protocol, a global agreement to halt the production of harmful chemicals called chlorofluorocarbons (CFC's). At that time, CFC's were used in hairsprays, and refrigerators.
The Protocol on substances which deplete ozone layer (Vienna Convention on the Protection of Ozone Layer). This international convention aimed at protecting ozone layer by producing a large number of substances responsible for ozone depletion's.
Plant pigments function like a team, with each pigment absorbing a different light wavelength to collectively ensure the plant efficiently captures and uses light, similar to players in a sports team playing different positions but working together to win.
Plant pigments, like teammates on a sports team, each have a unique role, but they work together for a common goal. In plants, the goal is to absorb and utilize light energy for photosynthesis. The most well-known plant pigment is chlorophyll, which absorbs blue and red light. Other pigments such as carotenes and xanthophylls absorb different light wavelengths, collectively helping the plant to capture as much light energy as possible. Just like a sports team where each player has a different position but all work together to win the game, the pigments in plants function in unison to ensure the plant efficiently captures and uses light.
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Plant pigments operate like teammates on a sports team, where each pigment absorbs different light wavelengths. The collaboration of these pigments ensures efficient light absorption and energy conversion, like teammates working together for a common goal.
Plant pigments operate very much like teammates on a sports team where each player has a unique role. Various pigments absorb unique wavelengths of visible light, much like different players on a sports team have unique roles, but work together to achieve the common goal. The most common pigment is chlorophyll, which is green and absorbs red and purple light. The light's energy is then used in photosynthesis, the equivalent of scoring a goal in the game.
Other pigments include bacteriochlorophylls, carotenoids, phycocyanins, and phycoerythrins, each absorbing different wavelengths and contributing to the plant's ability to absorb energy from more wavelengths. In places where sunlight is competitive, having various pigments ensures plants can maximize the absorption of light, much like having players with different strengths on a sports team ensures all areas of the game are covered.
These pigments work together to ensure that the plant can thrive in its environment. This collaboration is similar to how different players on a sports team work together to apply different strategies and tactics to win the game.
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b. 1 and 4
c. 4 and 6
d. 6 and 7
Answer:
The circulatory system stops the bleeding with platelets, which provide a seal so that healing can begin. The immune system kills off any bacteria that get into the wound and helps to eat away any debris so healing can begin. The nervous system responds to the cut with pain, telling me that an injury occurred.
Explanation:
This is the answer from Edmentum
Answer:
Platelets from the circulatory system halt the bleeding, creating a seal that allows healing to start. In order for healing to start, the immune system eliminates any germs that enter the wound and aids in the digestion of any waste. The cut causes my neurological system to produce pain, alerting me to the fact that I've been hurt.
Explanation:
paraphrased answer from edmentum
knowledge of osmosis to explain this phenomenon. Be sure the explanation includes the words
hypertonic, hypotonic, and isotonic.
Answer: 11. 10% is the concentration of solutes, 12. Osmosis is the net movement of solvent through a membrane according to the concentration of the solution.
Explanation:
Osmosis is a phenomenon that explains the movement of a solvent through a semi-permeable membrane without expenditure of energy, where the movement is through simple diffusion.
The tonicity is the total concentration of all solutes in the solution. Then, when a solution has a few particles, it has a low osmolarity, while a solution with many particles has a hight osmolarity. But, when there are two solutions separated by a permeable membrane to water (and not to the solutes or particles) the solvent (water) will move from the lower osmolarity side to the higher osmolarity side (which means, water moves from a region of low concentration to a region of high concentration)
To compare osmolarity of solutions, we use the terms hypertonic, hypotonic and isotonic. This is done, for example, to compar the osmolarity of a cell with the osmolarity of the extracellular fluid around it. If the extracellular fluid has a lower concentration than the fluid inside the cell, it is hypotonic with respect to the cell. In this case, the solvent will go into the cell. If the extracellular fluid has a higher concentration than the fluid inside the cell, it is hypertonic and the solvent will leave the cell from the region of lower solute concentration to the region with more solutes. At last, an isotonic solution is when the extracellular fluid and the cell has the same osmolarity and there will be no net movement of water in or out of the cell.
Increasing on mass would mean that there has been a net movement of water into the bag, because the solution was hypotonic. A decreased on mass mean that there has been a net movement of water out of the bad, because the solution was hypertonic. And if there has been no change or a very little mass change, it means the solution was isotonic, the same osmolarity or concentration of solutes was found inside and outside the cell.
Taking into account the concepts of tonicity and osmolarity, we can explain the process of dialysis which is the process of separating molecules across a semi-permeable membrane in a solution by the difference in their osmotic pressure. It is a laboratory technique where a solution that has many types of different solutes, is put into a semi-permeable sealed dialysis bag, (such as a porous cellulose membrane). Then it is placed in a container with a different solution, or pure water (which has a lower osmolarity). Molecules such as DNA or proteins are larger than the diameter of the pore thereby they are retained within the dialysis bag. However, molecules that are small enough to pass through the pores, such as water, tend to move in or out of the dialysis bag in the direction of the lowest concentration. It is usually used to remove salt from a protein solution. Then, if a dyalisis tube is labeled as 10%, it means its solute concentration is 10% of to the total volume of the dialysis bag.