What is deposition ?

a. the formation of precipitation with lower ph

b. when moisture is evaporated off the leaves of plants

c. when moisture mixes with the dust particles in the atmosphere

d. when heavier chemicals fall to earth after the burning of fossil fuels

1. a tropical dry forest carries out more rapid nutrient cycling

step 1: initiation

initiation is the beginning of transcription. it occurs when the enzyme rna polymerase binds to a region of a gene called the promoter. this signals the dna to unwind so the enzyme can ‘‘read’’ the bases in one of the dna strands. the enzyme is now ready to make a strand of mrna with a complementary sequence of bases.

step 2: elongation

elongation is the addition of nucleotides to the mrna strand. rna polymerase reads the unwound dna strand and builds the mrna molecule, using complementary base pairs. there is a brief time during this process when the newly formed rna is bound to the unwound dna. during this process, an adenine (a) in the dna binds to an uracil (u) in the rna.

step 3: termination

termination is the ending of transcription, and occurs when rna polymerase crosses a stop (termination) sequence in the gene. the mrna strand is complete, and it detaches from dna.

all matter is made up of atoms

in any element all atoms are the same

elements in a compound are always in a constant ratio: apex