BIOL 210 Lecture Notes - Lecture 10: Italian General Confederation Of Labour, Pupa, Chemical Warfare
10 Oct 2014
School
Department
Course
Professor
Document Summary
Only single cell that has a life of its own. In other taxa, other than mammal have quite exciting prolonged life. Some key events in the study of sperm & fertilization. Filters out sperm, but rejects idea sperm is needed. Middle piece important in powering sperm, have mitochondiral helix. Believed to derive energy from sperm sheath. Diversity of stylets and sperm in macrostomum worms and some other animals puncture barbed hook. Where males that are typically bigger inseminate and guard mate to ensure paternity. Parker: must be sperm from diff males in females interacting. There must have been a high frequency of successive copulation w/in the time period of a day, in recent human history. Maybe wasn"t very much selection on testis size, but now there isn"t. Now just drifting or being selected agasint. Brain vs balls trade-off: small scale, anecdotal, not good science!
