As life began to populate earth’s surface, what change was seen in the atmosphere?

a. more oxygen was consumed

b. more carbon dioxide was added

c. more carbon dioxide was consumed

d. more oxygen was added

Which of the following best describes the relationship between glucose and complex molecules such as hormones?

Hydrilla (hydrilla verticillata) is an invasive aquatic plant and one of the most serious aquatic pests in florida. hydrilla has already been introduced to hundreds of bodies of water throughout florida, hydrilla is difficult to control because it grows rapidly and survives in many different water depths and conditions. hydrilla • describe how hydrilla affects native plant and animal species. include both a biotic and an abiotic limiting factor. • suggest one biotic and one abiotic recommendation that could slow the spread of hydrilla

What substance acts to prevent sudden ph changes in bodily fluids?