Sponges, members of the Porifera, might be the simplest multicellular
animals on Earth. They do not have any tissues, organs, or organ systems. In
order for sponges to have evolved, what MUST have happened first?
the organization of cells into groups
symbiotic relationships among various cells
the evolution of cells with nuclei and organelles
the development of the cell wall as a protective mechanism
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Ces as a System

Plzzz hurry im being timed ! humans, like other organisms, require energy for growth and repair. when cells create atp for energy, carbon dioxide is produced as a waste product. how does the body respond to this process in order to maintain homeostasis? a. the digestive and respiratory systems interact to move carbon dioxide to the lower intestine, where it is transformed into methane. b. the circulatory and digestive systems interact to move carbon dioxide to the stomach, where it to break down food. c. the nervous and urinary systems interact to move carbon dioxide to the kidneys, where it is absorbed into the bloodstream. d. the circulatory and respiratory systems interact to transport carbon dioxide to the lungs, where it is expelled from the body.

Why is excretion necessary to maintain homeostasis?

If water were a non polar molecule, how would its properties be different ? a.) water would be a much lighter molecule b.) water would be able to climb up inside plants c.)water would not be able to form hydrogen bonds d.) water would stick together much more strongly