BSC 103 Exam 3 Study Guide

BSC 103 Exam 3 Study Guide Chapter 14 Mechanisms of reproductive isolation – both pre and post mating mechanisms What is the biological species concept and why will it not work for all organisms? What is sexual selection? What two factors are necessary for speciation to occur? Understand adaptive radiation What is the greatest cause of extinctions?

Chapter 15 Components of early earth’s atmosphere Stanley Miller’s contribution to the theory of origin of organic material Know the following: microsphere, ribosyme, hominid, primate, endosymbiont hypothesis Earliest fossils resemble what modern organisms. How did the earth’s atmosphere become oxygenated? What were the dominant organisms before this happened and how did they obtain energy with out oxygen? What are the main advantages to being multi-cellular? What adaptation of arthropods lead to them being a dominant land animal? Adaptations of reptiles to life on land What adaptations were important to hominid evolution (most shared with primates) What is the scientific name for modern humans and based on the fossil record what is thought to be our closest ancestor

Chapter 16 Know the following: Systematics, phylogeny, binomial nomenclature, endospore, mycelium, hyphae, mushroom Scientists who contributed to taxonomy, progression from a 2 Kingdom to a 3 Domain system Understand what evidence is used for classification (historically and for current system) Major categories of the nested classification hierarchy from most general to most specific Know general facts about each group: prokaryotes, animals, plants, fungi, protists What are some beneficial characteristics of bacteria and fungi Be able to place protists, plants and animals in to specific categories Know the major features/ adaptations for each category of organism Why are seedless plants and amphibians still tied to the water for reproduction? What are the 4 common characteristics of Chordates What is the only flying mammal?

Chapters 17 & 18 Know the following: transpiration, senescence, abscission, incomplete flower, stomata, xylem, phloem, root cap, root hairs, dermal tissue, ground tissue, mesophyll, cotyledon, endosperm, phototropism and gravitropism Location and function of apical meristem Basic functions of the various plant hormones Flower parts and their function What are the male and female gametophytes of plants How does pollination lead to fertilization How many sperm are required for fertilization in plants? Adaptations for pollen and seed dispersal Know at least three differences between monocots and dicots