One eighth to one sixth of the adult number of alveoli are present in the lungs at birth. their number increases after birth for at least how many years?

How are mutations continually being generated in a population (what are some of the causes of mutatuions? ) explain

How do you know that the plant cells in these two images have different jobs, or functions? a. because all plant cells serve different functions b. because they are two different colors c. because their dna are different d. because their structures are different

In a cladogram, what occurs at a node? a derived trait appears. evolution is stopped. an ancestor dies. the cladogram ends. aa as s as ss what are the chances that their offspring will have sickle cell anemia? 0% 25% 50% 100%