50. Identify which of the following is the most complex and explain your answer choice: stomach, heart, red blood cell, muscular system.

Muscular system because it is a complex body system, the others are organs in cells

The muscular system

Explanation:

To make it simple, you know how you have muscles throughout your body? This makes it quite complex, given that it has to be able to function with so many other muscles working together.  

The heart just pumps blood, the stomach digests, and the red blood cells carry oxygen throughout the bloodstream. Simple, right?

Hopefully this helped and made sense! ^v^''

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.

wha is what i will use to get my free points