2. Why should credit at reasonable rates be available for all?

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.

Use the drop down menus to match each example to the fossil topic discussed then to show how the fossil record gives evidence of evolution

Number and variety of living organisms includes genetic, species, and ecological types