an irregularly occurring and complex series of climatic changes affecting the equatorial Pacific region and beyond every few years, characterized by the appearance of unusually warm, nutrient-poor water off northern Peru and Ecuador, typically in late December.
They're attached to the plasma membrane.
(it's at the midpoint of the cell.)
Answer:
cappillaries
they connect the arteries and the veins
It’s corresponding molecule that or bonds to. I think it is a substrate.