All of the following statements are true of the water cycles except:

a. runoff occurs when excess water flows across the surface. this water can carry contaminants into rivers, lakes, and oceans.
b. water in reservoirs are used in households, industry, and agriculture. the largest reservoir is lake mead on the colorado river.
c. the oceans contain about 97.25% of all of the water on the planet.
d. once water vapor becomes liquid it will never be vapor again.

select the best answer from the choices provided.
a
b
c
d

q: compare the parts of a cell and the cell as a whole to another common nonliving system (i.e., a car, a city,

a:

comparing this to the inside of a food building/company.

all cells are surrounded by a plasma membrane, which protects the cell from its environment, keeping toxic substances out of the cell. it regulates which molecules are allowed to enter and exit the cell.

regulates all cell activity such as cellular metabolism, and growth in addition to storing and maintaining the cell's dna for transcription and replication. determines what proteins to make.

contains the organelles; site of most cell activity

the place where ribosomes do their working activity.

builds the proteins.

prepares proteins for use or export.

responsible for breaking down and absorbing materials taken in by the cell.

maintains cell shape.

transforms one form of energy into another.

this protocol provides a detailed procedure for nucleoprotein extraction from cultured cells and tissues in an efficient manner.