Help. Please l will freaking love you forever

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

Guard cells control which event? the growth of plants capture of solar energy gas exchange in leaves water absorption in roots

Hemoglobin is a proton that carries oxygen around the body what is hemoglobin made from