State two ways in which guard cells offer their adjacent epidermal cells

At which location in earth’s interior does the top density continue to increase as thickness decreases?

Awave has a wavelength of 15 mm and a frequency of 6 hertz. what is its speed?

In a population that is in hardy-weinberg equilibrium, there are two possible alleles for a certain gene, a and a. if the frequency of allele a is 0.4, what fraction of the population is heterozygous? a. 0.40 b. 0.60 c. 0.16 d. 0.48