Answer:
genes I believe off the top of my head
Explanation:
Answer:
Oxygen is moved around the body of an echinoderm in its C. water vascular system.
Answer:
The correct answer is- facilitated diffusion
Explanation:
In facilitated diffusion molecules(solutes) are moved from area having a high concentration of solute towards the area having low solute concentration through a semipermeable membrane with the help of specific proteins is called facilitated diffusion.
As molecules move along the concentration gradients so no energy consumption is required in facilitated diffusion. Transport proteins like channel proteins are used to transport the molecules across the cell.
The rate of transport is higher in facilitated diffusion than simple diffusion. Polar and charged molecules can be diffused by facilitated diffusion.
Pollutants can be flushed through a river system and move on downstream, but will remain longer in ponds and lakes. Any organism that come in contact with the contaminated water are harmed by it.
