What type of cell process occurs to generate this type of offspring? The instructor can see which common misconceptions are proving most challenging for the class as a whole. Her education includes an A. Biology, 7th Edition. Instructors can check the gradebook to see what topics students are struggling with and then address those topics in class.
As a faculty member at New Mexico State University and Rose-Hulman Institute of Technology, he taught a wide range of courses, including introductory biology, ecology, evolution, botany, and conservation biology. Scientific Skills Exercisesbased on the exercises in each chapter of the textbook, are available as assignable activities in MasteringBiology.
Although at puberty he has signs of virilization, he has developed pronounced gynecomastia. The handicap principle extends this idea, stating that a peacock 's tail, for instance, displays fitness by being a useless impediment that is very hard to fake. The Leydig cells produce testosterone, which also is responsible for the secondary sexual characteristics of males.
Secondary sex characteristics in non-human animals include manes of male lions  and long feathers of male peafowlthe tusks of male narwhalsenlarged proboscises in male elephant seals and proboscis monkeysthe hormones and secondary sex characteristics mastering biology book in Hartford facial and rump coloration of male mandrillsand horns in many goats and antelopes.
This process prepares the egg for ovulation.
Make Connections : The Eleventh Edition helps students make connections visually across biology topics. Community Ecology Sign up with Google or Facebook.
Wasserman Beth Winickoff Robert B. Meiosis and Sexual Life Cycles Log in. As a part of her mission to increase understanding of evolution, Lisa also teaches a nonmajors course called Evolution for Future Presidents and is on the Teacher Advisory Board for the Understanding Evolution website developed by the University of California Museum of Paleontology.