Which statement is true of y chromosomes

The frequency of alleles in a population that is in hardy weinberg equilibrium? a . changes in each successive generation b. is less important than the frequency genotypes c. shows evidence of the process of natural selection d. remains the same over several generations

Which number represents a basic ph, 4 or 9? numerical answers expected! answer for blank 1: i'll give

Is it better to learn about animals through a book, or actually going to see them in real life?