Answer:
agriculture
Explanation:
agriculture is the practice of farming.
Controls the thumb and index finger
Answer:
D
Explanation:
Clams naturally filter out contaminants in water
Without the clams, the water quality will drop dramatically, as the local ecosystem will lose its natural filtration system
Answer:
target cell
Explanation:
Cell communication includes one or more signaling cells and the target cell. Signaling cells produce signals. In the case of chemical signaling, the signaling cells produce chemical signals such as hormones or neurotransmitters or ligands. Target cells are the cells that respond to a specific signal produced by the signaling cell.
To receive and respond towards the signal, the target cells produce receptors where the signaling molecules bind to produce the desired effects in the target cells. For instance, liver and muscle cells are one of the primary target cells for the pancreatic hormone insulin.
