Continental-continental convergence
oceanic-oceanic
convergence
oceanic-oceanic
divergence
The mid-oceanic ridge system
is a continuous oceanic ridge
that runs through all five of
Earth's oceans. Although it
is an underground formation,
it is the longest mountain
range in the world.
The Himalayas are a non-volcanic
mountain range that includes
some of the world's highest
peaks. The Himalayas lle between
the Indo-Gangetic Plain of northern
India and the Tibetan Plateau.
The Mariana Trench in the Pacific
Ocean is the deepest trench in
the world. Along its subduction
zone, there's an area called
Challenger's Deep, which is

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explanation:

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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.

not sure if this is what you'r looking for eubacteria and archaebacteria

the tricuspid valve is present between right atrium and right ventricle