that‚ DNA barcoding has been developed. DNA barcoding is an important tool in categorizing the taxa of different species and it tells so much about the species’ traits‚ including genetic diversity. The Pomacea canaliculata was introduced in different parts of Asia and had been an invasive species and a pest in different ecosystems ever since the introduction. In understanding this species of snails‚ samples were collected‚ DNA’s were extracted‚ undergone PCR and electrophoresis‚ and was sequenced and
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Unanswered study questions in GREEN Study Questions for Lectures 1-5 1. Give 2 definitions of “species” and explain the strengths and weaknesses of each. Morphological “species”: individuals grouped into species based on their similar physical appearence. Strength: Easy to apply when species’ traits are defined and don’t overlap. Weakness: Hard to apply when there are morphological difference within species‚ such as in between male and female birds (males tend to be brighter colored and females are
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the interplay of biological and cultural factors D Question 3 Multiple Choice 1 points Natural selection can be summarized by which statement? All species are fixed. Organisms transform and pass these transformations on to their offspring. A divine creator creates all species according to an unknowable plan. Within a population‚ some variations are favored by environmental conditions and others are not. D Question 4 Multiple Choice 1
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hair) Strong Nuclear Isotopic spin* Force that keeps protons and neutrons together in a nucleus Weak Nuclear Spin* Force responsible for certain types of nuclear reactions Table 7: The four fundamental forces (or‚ interactions) and the properties on which they act. *Spin and isotopic spin are properties of elementary particles that we will not define here. Exercise: Find four “sources” of energy and identify the force responsible for the energy transformation
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Selective breeding * Homologies * Experiment evidence of adaptation Fossil record * Complex organisms in younger rocks * Simple organism in older rocks Biogeography * Study of geographical distribution of extinct and modern species * Isolated continents Homoplasy (similar form- different origin) * Homoplastic- features are similar features not inherited from a common ancestor * May adapt in similar ways to similar environments; convergent evolution * Homoplastic
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islet The trip to Makuluva reef Islet was a really exciting and exhausting trip for me as it empowers me to learn new concepts concerning the terrestrial and marine organisms that are found in the islet. Also I got learn a lot of new flora and fauna species and its scientific terms that I had in my course of study. Before we board‚ the boat we were told by the capital to put on our life jacket for our own safety. I was very nervous as it was my first time to travel on an open boat. On our way to Makuluva
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In addition to being responsible for taking scientific measures focused around new and existing animal species; Lewis was also responsible for the botany discoveries on the journey. Botany‚ flora and fauna were Lewis’s original interest and love. Over two hundred and sixty specimens were collected and investigated along the journey. As with the animal findings‚ some were sent ahead to scientists even before the journey ended‚ so examination and scrutiny could begin. These specimens were analyzed
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on the notion of variation. It argues that the numerous traits and adaptations that differentiate species from each other also explain how species evolved over time and gradually diverged. Variations in organisms are apparent both within domesticated species and within species throughout the natural world. Variations in colors‚ structures‚ organs‚ and physical traits differentiate a multitude of species from one another. Heredity is the mechanism that perpetuates variations‚ Darwin argues‚ as traits
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compared organisms and categorized them according to their common and distinct characteristic features. Through educational settings‚ you probably also have gained insights into similarities and differences between species. On the second page of this test‚ arrange the following species into your own phylogenetic tree diagram you believe based on their shared characteristics. (a) Drosophila melanogaster (fruit fly) (b) Ectoedemia castaneae (moth) (c) Hyla cinerea (tree frog) (d) Rattus rattus (rat)
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individuals within populations • Diversity of species within communities • Range of ecological roles within ecosystems • Genetic diversity • Species diversity • Diversity of environment & habitat Three Major Areas Three Levels LEVELS OF BIODIVERSITY Genetic diversity • Variety of genetic information in all individuals ( plants‚ animals and microorganisms). • Genetic diversity occurs w/n and between populations of species as well as between species. • New genetic variation is produced in populations
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