The traits of an organism are determined by the F. sequence of nitrogenous bases in deoxyribonucleic acid.
G. number of amino acids in a cell.
1
H. position of the ribosomes on the endoplasmic reticulum.
O. J. number of nitrogen bases in a codon.

Which must be kept in mind when determining if an explanation is correct? check all that apply.which must be kept in mind when determining if an explanation is correct? check all that apply.

Sediment layers stop lateral spreading when: they encounter a barrier they encounter an opposing current they run out of additional sedimentary material

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?