Answer: The word X represents the organs which is no longer used by the species.
Explanation:
The word vestigial shows the characters that is not used by the species anymore. Example is appendix which is considered as a vestigial organ in human beings as it is no longer useful for the human body.
This organ was used when there was only vegetarian food available for the human beings to eat.
But now that animals and vegetable both are available there is no need for the enzyme required the digestion of cellulose.
So, this organ is vestigial for the human body.
The reason why nuclear fusion is currently not used as an energy source on Earth is mainly because we're still building the required technology which would enable us to use and have nuclear fusion and harness its power.
Your cardiovascular system is made up of the heart and blood vessels (arteries, capillaries, veins).
Answer:
<h2>option
<em><u>b</u></em> is correct , dear</h2>
Explanation:
I hope it helped
hey buddy can u do a favor to me
if u don't mind ......plz subscribe to my UTube channel - gtron9528
