BIOLOGY 101 Study Guide - Midterm Guide: Atrazine, Corpus Luteum, Prolactin
Document Summary
Most common form of fertilization in aquatic habitats: sexual dimorphism can be present, usually no specialized organs for fertilization, hormonal control of reproduction is present. Occurs in some aquatic organisms such as live-bearing fishes: sexual dimorphism is almost always present, usually specialized organs for fertilization, hormonal control of reproduction is present, parental contribution of nutrients may occur. Turtle penises can be about 1/3 of the body length and come cases species-specific glans. Humans have lost an ancestral penile spine enhancer from the ar locus. Humans also fail to form the penile spines commonly found in other animals, including chimpanzees, macaques and mice: simplified penile morphology tends to be associated with monogamous reproductive strategies in primates. Many mammals there is a bone in the penis called a baculum. Many species the shape and size is species specific. Baculum is found in primates (not humans), rodents, insectivores (moles and shrews) and carnivores: pric.
