A cell membrane can me compared to a wall, one that is flexible and malleable but strong enough to repel unwanted things from the cell. it also keeps the cell together in its shape and form
B, proton is positive and it does not represent the symbol
I believe the answer for the above question is Gene pools. Gene pools are the total number of genes of every individual in an interbreeding population; contains variations in genes, the relative gene frequencies, and also the allele frequencies. Relative frequency being the average number of occurrences of a particular event in a large number of repeated units while the allele frequency of an allele compared to other alleles of the same gene in population.
B) Covalent, the answer you have been looking for.
