Answer:
the earth has an incredible amount of water, but only the 3% of all of it, fresh water, can be used for human use like drinking water, showers/baths, etc
Explanation:
the rest of the water is used for oceans and cannot really be used for human's everyday use, only freshwater can. There are still fish and other animals that live in freshwater though so it is important for humans not to use too much of it
Extension- increasing the angle between two boned of the straightening of a limb
Answer: Self-replicating RNA
RNA can do catalytic functions like enzymes. It carries genetic information and replicate itself. It also carries information about vesicles which carries it. RNA is less stable than DNA which confirms that genetic material is evolved from a less stable to highly stable form.
It is the third option. Reason being is because the first one describes what they do when danger approaches and it doesn't say anything about moving. The second one describes what they do to protect their young from the harsh environment around them; no movements mentioned. The fourth one just says what a penguin does but they can be standing when they do it; no mention of any movements at all.
Hope this helps!! :)
<span>Cephalochordates are animals from chordate subphylum which are distinguised to have all the characteristics of a chordate from their larval stage and is true to their adulthood. They are segmented marine animals having elongated bodies with notochords extended from head to tail. The notochord of these animals are persistently present throughout their lives. The answer to this question is letter C. "Notochord is present throughout their lives."</span>