Which of the following is composed of two layers of phospholipids associated with proteins? help asap

Spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?

To maintain asepsis when administering an injection, all parts of the syringe can be handled except the:

Dna and rna share a number of similarities,but they also differ in certain aspects of their structure. wich nitrogenous base is found in rna but is not found in dna