Answer:
they have certain functions and or adaptations that allow them to move without spines
Explanation:
Answer:
overreacts to an antigen
Explanation:
Allergies to substances are as a result of immunological dysfunction.
Answer:
Housing development and shopping mall
Explanation:
housing development and shopping mall may cause wildlife habitats destroyed. also the land being destroyed is not unenvironmetally friendly
It means that they are not like pre-set blueprints. They react differently according to changes in the environment.<span />
