Scientists suspect that human language evolved around 150000 years ago.
<span>the human language is linked to the Homo Sapiens who lived around 150,000 to 200,000 years ago in eastern or perhaps southern Africa</span>
The reason why scientists suspect this is <span>by evidence of abstract and symbolic behaviour in the early modern humans, taking the form of engravings on red-ochre.
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Answer:
1. gravel of the sand: a part is dissolved and the remainder is grouped at the bottom of the beaker.
2. drop of sunflower oil: It is not absorbed and heaps on the surface of the water contained in the beaker.
Explanation:
Gravel of the sand is a polar substance. This means that this substance has the ability to dissolve and mix with water in a system in which both were placed together, such as a beaker, for example. However, the beaker limits the amount of water, which limits its ability to dissolve polar substances. Therefore, depending on the quantity, the gravel of the sand, when placed in a beaker with water, will dissolve, in parts, what is not dissolved will accumulate in the bottom of the beacker, because the gravel of the sand is denser than the water.
With the drop of sunflower oil the exact opposite happens. This is because drops of oil are nonpolar substances, which means that they do not have the ability to be dissolved in water. This means that when dropped into the beaker with water, the drop of sunflower oil will not dissolve, but will pile up on the water surface, because it is less dense than water.
Answer:
lungs. that is why it is called respiratory system
Explanation:
Insect herbivory is likely to affect the competitive relationship between the species in that a plant affected by these insects will have a hard time competing with those who are unbothered by the insects.
<em>Although I could not locate the Graph or options for this question online, I can offer a general assessment to help you answer the question.</em>
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Insect herbivory is when insects consume plants or parts of a plant as their main food source. Interestingly, this term also applies to those insects who do not harm the plant, but consume the pollen, etc.
However, focusing on harmful insect herbivory, we can assume that in the presence of these insects a plant will have a hard time staying alive or mating effectively due to the damage caused. Therefore, we can assume that <u>the </u><u>plant </u><u>on the </u><u>left </u><u>will not be able to stay </u><u>competitive</u>.
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<span>Thoracentesis is not an approved procedure to inflate a collapsed lung. Thoracentesis, also called thoracocentesis and known as a pleural tap is used in the medical field as a procedure to remove air or fluid from the pleural space in the lung for diagnostic or therapeutic purposes.</span>
