The correct answer for this question is "Epiglottis". The Epiglottis is responsible for cutting off the passage way to the airway while swallowing/eating food to prevent the food from being inhaled by the body.The Epiglottis has a leaf-like shape structure with a cartilage that covers the passage way into the air ways of the body.
The oldest fossils present at the bottom of rock layer whereas the youngest fossils are present in the top layer.
<h2>Rock layers from oldest to youngest</h2>
The rock layers that is located farthest from the ground surface are considered as the oldest rock layers and rock layers that are closest to the ground surface are considered as the youngest. A fossil is the remains or traces of plants and animals that lived long ago.
<h3>Presence of fossil</h3>
Those fossils which are present at the bottom of the rock layers are considered as the oldest fossil followed by the upper layer's fossil and so on. The fossils present at the top layer are the youngest fossils so we can conclude that oldest fossils present at the bottom of rock layer whereas the youngest fossils are present in the top layer.
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Answer: Resistance
Explanation:
Bacteria are single cell microbes that can be found in plant cells, animal, human body...They could be beneficial some are use for fermentation or harmful.
Over time, Bacterial have shown resistance and virulent to man by gaining resistance to antibiotics use to destroy there adverse effect in human system.
Some bacteria such as mycobacterium gonorrhoeae that causes gonorrhoea has shown medium resistance to antibiotics
Acinetobacter Baumannii causing pneumonia has shown a high level of resistance towards antibiotics making it difficult to reduce there effect. This has lead to more research on how this bacterial will be less virulent and harmful to man
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