During cellular respiration, cells break down sugars to release energy. In this process, water and carbon
dioxide are produced as waste products. What must happen to these waste products in order for a cell to
maintain homeostasis?
A. They must be excreted from the cell.
B. They must be used for photosynthesis.
C. They must be digested and used as food.
D. They must be permanently stored inside the cell.

A. They must be excreted from the cell.

Explanation:

Respiration is a process in which energy is released due to the breakdown of glucose molecules with the addition of oxygen forming carbondioxode, water and energy in the form of ATP. This energy is used by the cell in different processes and activities. Water and carbondioxide is a waste product which is removed from the cell during breathing of organisms.

answer : haversian

[explanation: -(compact bone is organized as parallel columns, known as haversian systems, which run lengthwise down the axis of long bones. these columns are composed of lamellae, concentric rings of bone, surrounding a central channel, or haversian canal, that contains the nerves, blood vessels, and lymphatic system of the bone)]

igneous rocks are formed by solidification of cooled magma (molten rock), with or without crystallization, either below the surface as intrusive (plutonic) rocks or on the surface as extrusive (volcanic) rocks.  

the composition depends on the source magma. there are almost a thousand types of composition found till now.  

hope this