Answer:
The lichen is a decomposer that digests rocks and forms soil.
Answer:
Explanation:
1- closely packed osteons or haversian systems, used to provide strength and protection to bones.
2- Spongy bone consists of plates (trabeculae) and bars of bone adjacent to small, irregular cavities that contain red bone marrow. provides balance to the dense and heavy compact bone by making bones lighter so that muscles can move them more easily.
The scales or outer layer of an artichoke are called bracts
A.
Endangered species is closer to extinction
Threatened ones are closer to becoming endangered