I think it is. d but I'm not sure
Explanation:
The amount of salt in a salt marsh depends on the ocean tide.
Answer:
The tubule adjusts the level of salts, water, and wastes that will leave the body in the urine. Filtered blood leaves the kidney through the renal vein and flows back to the heart.
Pee leaves the kidneys and travels through the ureters to the bladder. The bladder expands as it fills.
Answer:
sorry I don't know understand
All cells come from pre existing cells because if the cells never existed, then the cells could never be created. Cells multiply, from one another constantly forming from cells before them.