Choose three types of fossils. describe their appearance and how they were formed.

Hello, user from 5 years ago!

Amber fossils happen when insects become trapped in tree resin, the tree resin preserves the insect.  They usually have a yellowish tint to them and contain the insect that was trapped.

Trace fossils are preserved records of life such as footprints or nests.  For example when an animal leaves a footprint and the mud the footprint was in turns into rock, it is preserved.  

Petrified fossils happen when the structure of animals buried underground are replaced with minerals.

i think the answer is gold im not entirely sure

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.