PLEASE HELP Which statement describes a main difference between primary and secondary succession?
A. Primary succession is always followed by secondary succession.
B. Secondary succession always ends in a climax community while primary succession does
not.
C. Primary succession always starts with barren, rock areas while secondary succession
does not.
D. Secondary succession always reaches a climax community of trees while primary
succession ends with pioneer species

Which statements about the fluid mosaic structure of a membrane are correct? select the three correct statements.which statements about the fluid mosaic structure of a membrane are correct? select the three correct statements.the framework of a membrane is a bilayer of phospholipids with their hydrophilic heads facing the aqueous environment inside and outside of the cell and their hydrophobic tails clustered in the center.because membranes are fluid, membrane proteins and phospholipids can drift about in the membrane.the diverse proteins found in and attached to membranes perform many important functions.the kinky tails of some proteins keep the membrane fluid by preventing the component molecules from packing solidly together.membranes include a mosaic, or mix, of carbohydrates embedded in a phospholipid bilayer.