What is dna and what is it function

Ectocarpene is a volatile, sperm cell-attracting material released by the eggs of the seaweed ectocarpus siliculosus. its constitution is all the double bonds are cis, and the absolute configuration of the chirality center is s. draw a stereochemically accurate representation of ectocarpene.

Describe two recent or ongoing space missions.

What best describes the dropping height of a ball that bounces back up to a height of 45 cm