Air pollution has become an extremely serious problem. Air pollutants affect both plants and animals. Under polluted conditions, plants develop different physiological, morphological and anatomical changes. Pollutants cause damage to cuticular waxes by which then they enter the leaves through stomata. This further leads to injury to plants which can be either acute or chronic. Changes in stomata due to air pollutants which seem to be small can be of great consequence with respect to survival of the plant during stress. These effects can further lead to disturbing the water balance of leaf or whole plant. Respiration also gets affected because of the exposure of plants to air pollutants. The present paper deals with the effect of air pollutants on stomata as well as on respiration leading to affect gaseous exchange.
Answer:
All living things are able to respond to stimuli in the external environment.
Explanation:
All living things are able to respond to stimuli in the external environment. For example, living things respond to changes in light, heat, sound, and chemical and mechanical contact. To detect stimuli, organisms have means for receiving information, such as eyes, ears, and taste buds.
<em>A control is that group in an experiment that does not receive any treatment and is used for comparison with the test result.</em>
<u>Answer:</u> <em>A) a control</em>
<u>Explanation:</u>
In the experiment mentioned, the control is missing because the test group as mentioned are the plant set that receives the treatment that is the different concentration of nitrate and phosphate.
The effect of these nutrients on growth will be observed and evaluated. The time period of the experiment is one month which might exceed.
Answer:HIV attacks a specific type of immune system cell in the body. It's known as the CD4 helper cell or T cell. When HIV destroys this cell, it becomes harder for the body to fight off other infections. When HIV is left untreated, even a minor infection such as a cold can be much more severe.
Explanation:
I think the correct answer from the choices listed above is option D. There is not false statement from the choices listed above. All are true about sugars. Hope this answers the question. Have a nice day. Feel free to ask more questions.
