What is the correct sequence of organisms if a community is going through secondary succession? a. grasses establish themselves in the community b. shrubs establish themselves in the community c. soil formation occurs d. trees establish themselves in the community c - a - b - d a - c - b a - b - d d - c - a - b?

The correct sequence is c - a - b – d.

Soil formation occurs, grasses establish themselves in the community, shrubs establish themselves in the community and trees establish themselves in the community.

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.

your body is trying to warm itself up. or more precisely, sensors in your skin send messages to your brain to generate heat to your body.