Answer:
Promoter 2
Explanation:
Promoter 2 is the best choice because the resistance gene will only be expressed in the leaves of the corn plant. Promoter 3 only expresses genes in the corn roots, so the toxin would not be available in the leaves for the pest to eat. Promoters 1 and 4 would express the resistance gene in the leaves of the corn plant, but the toxins would be expressed in the corn cobs as well, which may then be fed to livestock.
The presence of a tumor in the larynx is known as Laryngeal cancer. It may affect the process of breathing, speaking, and swallowing of the food down to the esophagus.
<h3>What are the properties of a cancerous cell?</h3>
Cancerous cells have numerous properties. Some of them are as follows:
- It is an undifferentiated cell that continues uncontrolled rapid division and proliferation.
- It is immortal which means allows the inhibition of apoptosis.
- It follows the process of metastasis.
Laryngeal cancer disturbs the passage of air in and out of the lungs through the larynx and trachea. The process of migration of cancerous cells from the initial origin to the other connections may describe as metastasis.
Laryngeal cancer is caused primarily by smoking, drinking alcohol, and other age-related issues. The symptoms of this cancer may include voice changes, sore throat, or a cough that resides long away.
Therefore, it is well described above.
To learn more about Cancerous cells, refer to the link:
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<span>Microscope slide holder. When you observe samples under a light microscope, they will usually be mounted on a glass slide. The slide holder is used to secure your slide in place so you will not inadvertently change its position.The paired knobs below the stage on the right-hand side move the slide holder either forward and back or left and right. These allow you to precisely control the position of the sample on the stageThe scales on the slide holder can be used to determine the position of an object on the slide. Thus, you can find an object, note its location, move to a new position and then later return to the mapped object. </span>The condenser. Below the stage is the condenser which is used to focus light on the sample. On the left side of the condenser is a knob that can be used to move the condenser up or down. In the up position, intense light is focused on the sample while in a lower position the light is less intense and more diffuse. As a general guide, you will usually want the condenser relatively high for looking at stained samples while a lower position may be preferable for increasing the contrast of unstained materials. The condenser also has an iris diaphragm which can be open or closed to control the light on the sample. The diaphragm opening is altered by moving the lever located at the front of the condenser.
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Answer:
the cell wall surrounds the plasma membrane of the cells and provides strength and protection against mechanical and osmotic stress.
