Which of these best describes Earth’s mantle? A: Most dense layer, consists of the outer and inner parts
B: Thinnest under the oceans and thickest under continents
C: Middle layer, density increases with depth as pressure increases
D: Least dense layer overall, consists of two layers of different thickness

Describe your dna model. which part do the straws represent? the pushpins? the paper clips and the black dots you made with the marker?

Label the steps for protein synthesis in order, beginning with the first steponce the protein is made, the gene for a particular trait is expressedmrna joins the ribosome, and the anticodons from trna join mrna to form a chain ofamino acidsrna polymerase unzips dna and free rna nucleotides join dna to form mrnav a chain of amino acids is formed from peptide bonds, creating a proteinmrna is transported from the nucleus of the cell to the ribosomes of the cell.

The part of the eye that closes and opens to let light in is .