Harmful environmental agents cause an average of 4-5 percent of birth defects. Please select the best answer from the choices provided T F

Which of the following is an example of an environmental change the affected the evolution of life a. volcanic activity b. changes in climate c. mountain building d. all of the above

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.

Facilitates growth and change in neurons and the migration of neurons to different sites in the brain