Which disease is attributed to nondisjunction? a) hemophilia b) down's sydrome c) cystic fibrosis d) sickle-cell anemia

Aeukaryotic cell must be from a plant if the cell a) a nucleus b) a nuclear envelope c) cytoplasm d) a cell wall

Which of the following describes a boom period? a. as one population increases, another population decreases. b. as one population increases, the other population also increases. c. as one population decreases, another population increases. d. as one population decreases, another population also decreases

Number and variety of living organism; includes genetic, species, and ecological types