Natural selection gizmo Proctored Exam.

Biological evolution - correct answer Change in the inhereted traits of a population of organisms that occurs over many generations. Misconception alert:----------- refers to the change in populations of organisms over time,but does jot imply how these chnages have taken place. In spite kd a variety of critcisms,natural selection is considered by most biolgists to be the primary mechinism of evolution Camouflage - correct answer Coloring or markings that help an organism blend in with its surroundings Lichen - correct answer A combination of two primary organisms l, a fungus and green algae. forms a thin "crust" on rocks and tree trunks Natural selection - correct answer The process by which favorable inherited traits become more common over time. Darwin proposed that ----------- was the primary mechanism of biological evolution. ------------- assumes the following: more organisms are born then can survive and reproduce. Organisms compete for limited recorded and survival. There variation between organisms, and these variations can be inherited. Some variations make an organisms more likely to survive and reproduce. over time, favorable variations will spread throughout a population, while unfavorable variations become less frequent morph - correct answer a distinct form of a given species. different --------- of the same species may look different but can successfully reproduce. For example a cocker spaniel can successfully mate with a poodle. adaption - correct answer a trait that is beneficial to an organism allele - correct answer one or two more forms that a gene could take. chromosome - correct answer a rod-shaped structure within a cell's nucleus that is composed of DNA. ---------- are passed from one generation to the next.