The Smooth (ER) endoplasmic reticulum
Answer:
All the living things together in an ecosystem form a community.
Explanation:
The answer would be c. This is because hormones are apart of the endocrine system and dispose of extra salt in the body. Helping with urinating is part of the excretory system.
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Heartwood. In contrast to sapwood, a term for the dead, clogged xylem cells near the center of a tree. Heartwood is the tree's main column of support.