Which characteristic of a cell membrane alloes it to control materials entering and leaving a cell?

What is the density of the black hole

What is the number of atoms in 3.54 mol s

In pea plants, the allele for tallness (t) is dominant to the allele for shortness (t). in the cross between a tall pea plant and a short pea plant shown below, what is the probability that the resulting offspring will be tall? whats the percent