The stomata of leaves are surrounded by guard cells. The guard cells help the leaves to regulate the rate of transpiration of water from the leaves by opening and closing the stomata. When water enter the guard cells, they swell and bulge and this makes the stomata to open. So, with high water pressure, the guard cells will stimulate the stomata to open. The reverse will be the case if the water pressure is low.
Answer: Infection occurs when the host is exposed to pathogens. virus uses the cell's metabolism, and replicates itself while destroying the cell or changing the cell's genetic makeup.
Explanation:
- A virus is a miniscule pocket of protein that contains genetic material.
- Viruses pose a considerable challenge to the body’s immune system because they hide inside cells.
- This makes it difficult for antibodies to reach them. Some special immune system cells, called T-lymphocytes, can recognise and kill cells containing viruses, since the surface of infected cells is changed when the virus begins to multiply.
- Many viruses, when released from infected cells, will be effectively knocked out by antibodies that have been produced in response to infection or previous immunisation.
- Antibiotics are useless against viral infections. So antiviral drugs work differently to antibiotics, by interfering with the viral enzymes instead.
Hence virus are the pathogen that use the cell's metabolism. And replicate itself while destroying the cell or changing the cell's genetic makeup. viruses are so simple that they use their host cells to perform their activities for them
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Alcohol acts as a diuretic because it inhibits the release of ADH.
Answer:
Fungi have chitin as a component of their cell walls rather than cellulose, which is one of the primary differences between plants and fungi. Chitin and cellulose are both made up of polysaccharide chains. Another difference between plants and fungi is that plants contain chlorophyll whereas fungi do not.
<u>The difference between dog and horse teeth are as follows:</u>
- The dental formula of dog is 2 (I3/I3, C1/C1, P4/P4, M2/M3), whereas for the horse it is 2 (I3/I3, C1/C1, P4/P4, M3/M3).
- The total number of teeth in the dog is 42, whereas in the case of the horse it ranges from 40 to 42.
- In the the dog, upper jaw has 2 molar teeth, whereas in the case of the horse, the upper jaw has 3 molar teeth.
<u>The similarities between dog and horse teeth are as follows:</u>
- The most notable similarity in the case of both the animals is that they have the same number of Incisor, Canine, and Premolar in the order of 3, 1, and 4 respectively.
