PPT-Species and Populations

Significant ideas A species interacts with its abiotic and biotic environments and its niche is described by these interactions Populations change and respond to interactions with the environment. Chapter Overview Questions. What are the major characteristics of populations?. How do populations respond to changes in environmental conditions?. How do species differ in their reproductive patterns?. speciation. Miss Amy Heeraman Form 5 Biology Friday 30. th. January 2015. VIDEO . . INTRODUCTION. Look at the video.. https://www.youtube.com/watch?v=Q2vsG77PZ80. – video 1 on speciation. VIDEO DISCUSSION. A . human chain formed by joining your left hand to your mother's right hand, . & . your mother links her left hand to her mother's right hand, . & . so on through your maternal ancestors in a straight . FIFTH EDITION. CHAPTER. . 19. Speciation and the Origins. Of Biological Diversity. © . 2012 W. W. Norton & Company, Inc.. Anu Singh-Cundy • Michael L. Cain. Cichlid Mysteries. Earth’s changes separate populations of organisms, alter the environments in which they live, and set the stage for evolution. Species - A group of populations that is . reproductively . isolated. . from other groups. The study of speciation has classically focused on the evolution. of reproductive isolation.. Reproductive isolation . Cynotilapia. . afra. , introduced at West . Thumbi. Island in Lake Malawi in the 1960s, has split into two genetically distinct populations, located at the north and south ends of the island. How can scientists determine whether these populations are now different species, according to the biological species concept?. A mechanism for change in populations.. Any change in the . inherited . traits within a population across generations. Individuals better adapted to their environment tend to survive and . produce more offspring. A . population. . is a group of organisms of the . same. species that live in a specific geographical area and . interbreed. .. A population is a . reproductive. group because organisms usually breed with members of . species. . population. . habitat. niche. . community. Four Square Diagram = Include: definition, example(s), picture, description, pronounce, origin, sentence.. Definition. Examples. Picture. Choice. and Population Control. Chapter 5 (Miller and . Spoolman. , 2010). Figure 5.1. An endangered southern sea otter in Monterey Bay, California (USA), uses a stone to crack the shell of a clam (insert). It lives in a giant kelp bed near San Clemente Island, California (background). Scientific studies indicate that the otters act as a keystone species in a kelp forest system by helping to control the populations of sea urchins and other kelp-eating species.. Prepared by. Dr. . Syed. Abdullah . Gilani. Course: . Phylogenetic. . Systematics. I (BIOL471). Sites and Marshall (2004) analyze 12 methods proposed to delimit species. . They divide . these methods into two categories: . Vestigial Structures. DNA & The Genetic Code. Fossil Record. Strata & Superposition. Relative Age vs. Absolute Age. Fossil Record. Per the theory - You would expect older rock to contain mostly organisms that are less complex and less like current (living) organisms. What is . Biodiversity. ?. It is the variety of earth’s species, the genes they contain, the ecosystems in which they live, and the ecosystems processes such as energy flow and nutrient cycling that sustain all life.. Demaya. , John . Sebit. Benansio. 4. , Fabio Petrozzi. 5. , Godfrey C. Akani. 2. , . Edem. A. Eniang. 6. , Stephanie N. Ajong. 7. , . Massimiliano. Di Vittorio. 8. , . NioKing. Amadi. 2 . ,. . Daniele Dendi.