Even though amoeba, paramecium, and spirogyra are quite different, they are all often classified in the same group, Protista because this group holds various types of eukaryotic organisms that are heterotrophic and unicellular.
This type of classification is not based on evolutionary and genetic similarities, but only on the properties of being unicellular, so there are many vastly different organisms in this group.
Yes, it is possible that evolution occurs in this case.
At first, the new insecticide is effective against the boll weevil. Spraying the insecticide will kill the boll weevil in a way. The insecticide might attack boll weevil enzyme or any part of its organs.<span>
But some of them might have a mutation that renders the insecticide ineffective. The mutation probably happens to DNA that code the enzyme or protein that targeted by the insecticide, makes the insecticide completely ineffective.
The next spray will kill all old organism, leaving the new resistant organism in less competition area. This will allow the resistant organism to grow fast and eventually replace all the old organism in the area.</span>
Answer:
Inhale
Explanation:
When the diaphragm is pulled downwards, it increases the volume and decreases the air pressure within the thoracic cavity, and you inhale.
De-nitrification is the process that removes the useful nitrogen containing compounds from soil. This process is performed by soil bacteria that convert nitrates (NO3) into gaseous nitrogen (N2). When nitrogen is lost from the soil it slows down the proper development of plants growing in that soil.
Farmers are taking important steps to minimize de-nitrification and improve crop production , such as:
Usage of fertilizers:
They use suitable nitrogen containing fertilizers that maintain soil nitrogen as urea or ammonium and slow down de-nitrification. The selection of fertilizer is very important to lower de-nitrification, for example, the usage of urea containing fertilizers is better for controlling de-nitrification than urea containing fertilizers.
De-nitrification inhibitors:
Farmers also use some de-nitrification inhibitors -the chemical compounds which slow down the rate of de-nitrification. These compounds belong to a specific group of chemicals called "Procyanidins" that restrict denitrifying bacteria from converting nitrates (NO3) into gaseous nitrogen (N2). Therefore, they help in improving the growth of crops.
Cover Crops:
Farmers also grow some cover crops after they harvest the main cash crops from land. The cover crops protect and add nutrients to the soil. The cover crops also capture the nitrates from soil and help in slowing down the process of de-nitrification. Therefore, farmers prefer to grow cover crops and increase the growth and yield of crops.
