Hemophilia is a condition in which blood does not clot naturally, and a person with hemophilia could bleed to death if injured. a hemophiliac must receive regular injections of what blood part to stay alive?

How do tides affect the organisms living in intertidal zones? a. no organisms live in intertidal zones due to the tumultuous environment. b. the mechanical forces of the waves keeps the organisms clean. c. only plants live in intertidal zones because the animals float away with the waves and never return. d. the mechanical forces of the waves can dislodge the organisms from their habitat.

During which phase does earth see more than half of the moon's surface? 1)first quarter2)third quarter3)waxing gibbous4)waning crescent

Which statement correctly describes a way that mutations increase the likelihood that a species will survive in a changing environment