Answer:
The diameter of the xylem vessels should be small in order for the capillary action to take place.
Explanation:
The vessels through which water is transported to different parts of the plants and trees are the xylem. Water is transported in the trees through a mechanism named as capillary action. This mechanism can occur only if the diameter of the vessels are small.
The water molecules adhere to the walls of xylem and an upward force is generated. If the diameter of the vessels i.e xylem would be small then the surface tension between the xylem and water molecules would be enough to move the water in an upward direction.
Pat has likely been in the sun longer than John, since she/he works outside. Since she is outside longer, her/his skin has learned to adapt to it by producing more melanin to protect her/him. John doesn't go outside as much so his skin doesn't need to adapt to sun rays.
Answer:
When the level of release of carbon dioxide during respiration and use of carbon dioxide during photosynthesis this results in a compensation point. At compensation point the net available carbon dioxide to phototrophs becomes zero. As, carbon dioxide is the chief ingredient for photosynthetic products like glucose and oxygen. These products are used up during the process of respiration. When the rates of two processes photosynthesis and respiration becomes equal. Phototrophic organisms will not be able to compensate for lack of carbon dioxide levels. Phototrophs will not be able to produce their food in the form of glucose and hence will not be able to respire too. This will result in lack of overall available food from phototrophs and lack of available oxygen for respiration. This will result in decline of organisms on earth.
When a person cries, tears are exported from cells through the process called Endocytosis.
Answer:
Effect of independent variable is studied on the dependent variable or subject of the experiment.
Explanation:
The independent variables are very important in an experiment. Basically the affect of an independent variable is studied on the subject or dependent variable.
Thus, it can be said that independent variable will produce the effect on the dependent variable.
Here in this case the different types of disinfectants are the independent variable and their effect will be observed on the bacteria (subject or dependent variable)