Answer:
The ray which strikes at the normal is called incident ray and the ray which bounce back after striking the surface is called reflected ray
Explanation:
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Most fish exchange gases using gills<span> on either side of the </span>pharynx<span> (throat). Gills are tissues which consist of threadlike protein structures called </span>filaments. These filaments have many functions including the transfer of ions and water, as well as the exchange of oxygen, carbon dioxide, acids and ammonia.<span>Each filament contains a </span>capillary<span> network that provides a large </span>surface area<span> for exchanging </span>oxygen<span> and </span>carbon dioxide<span>. Fish exchange gases by pulling oxygen-rich water through their mouths and pumping it over their gills. In some fish, capillary blood flows in the opposite direction to the water, causing </span>countercurrent exchange<span>. The gills push the oxygen-poor water out through openings in the sides of the pharynx. Some fish, like </span>sharks<span> and </span>lampreys<span>, possess multiple gill openings.</span>
Explanation:
No because a speech has to be a meaningful speech
When the fossil fuels are burned they produce energy and give of harmful gas
The main difference in structures between human’s and cat’s liver are lobes.
<span>The cat’s liver consists of six lobe sand those are the left lateral, left medial, right medial, right lateral, caudate and quadrate lobes. On the other hand, a human liver has only four lobes, which are the right, left, caudate and quadrate lobes.</span>
