This is called a chemical bond.
Answer: Non-living factors in an ecosystem.
2. A large region of land with a distinct climate and certain types of plant and animals.
Explanation:
. Biosphere
b. Biome
c. Population
d. Abiotc
e. Ecosystems
f. Biodiversity
g. Food Chain
h. Aquatic
i. Community
Caleb’s immune system will have the experience of getting rid of this antigen and know exactly what to do to overcome it efficiently.