Answer:
The first organisms to appear in areas of primary succession are often mosses or lichens. These organisms are known as pioneer species because they are the first species present; pioneer species must be hardy and strong, just like human pioneers.
Explanation:
Answer:
They serve us as shelters.
It protects us from many natural hazards like, rain,heat etc.
It provides a privacy to every person.
Gonadal differentiation begins approximately 6 weeks after conception.
