What must first occur for transcription to begin?
A) mRNA moves the code from the nucleus to the ribosome for protein
B) production. A gene is expressed through protein production.
C) RNA polymerase attaches to the promoter.
D) A repressor protein must attach to the operator.

c.more precipitation,but only when emission levels.

more words for this could be abiotic and biotic

abiotic: living organisms within an ecosystem

biotic: non-living organisms within an ecosystem

homeostasis is the tendency towards a relatively stable equilibrium between interdependent elements, especially as maintained by physiological processes. and this is how it applies to the integumentary system. back to top. skin functions in homeostasis include protection, regulation of body temperature, sensory reception, water balance, synthesis of vitamins and hormones, and absorption of materials. when body temperature falls, the sweat glands constrict and sweat production decreases.