Ratings that are not completely accurate are known as

Most animal cell membranes have proteins that pump. ions out of the cell and potassium ions into this

Ihave no idea how to solve these. plus there's another question that is 2) a 10 kilogram meteorite is collected in space and brought back to earth. it is composed of 1.25 kg of uranium-238 and 8.75 kg of lead-206. how many u-238 half lives have passed? what is the approximate age of the meteorite?

Involving transcription and translaton. explain the causes and effects of damage to the genetic code.