Half yearly studies Chapter 2: Reproduction What is Sexual Reproduction? Sexual reproduction occurs when offspring result from the fusion of a male reproductive cell and a female reproductive cell. These special reproductive cells are called gametes and they are produced in the reproductive organs of the organism. External Fertilisation * Gametes are tiny and are dehydrated extremely easily‚ so they only survive in specific conditions. * Some animals‚ specifically those that live in
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Biology Unit 4 Chapter 1: “Terrible Lizards” Paleontologist: someone who studies “ancient organisms” Paleobiology – the study of ancient life Paleontology is particularly important with regard to scientific theory‚ since for many children dinosaurs are the first exposure to scientific concepts Early Dino Stuff In 1676- large meat- eating femur (Megalosaurus) was discovered and people thought it was a giant human’s scrotum – “Scrotum humanum” First scientific name given to dinosaur Prior to 1800s
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Evolution by natural selection is slow but can be observed in certain situations. How to spot evolution in real time: Artificial selection – manipulation by humans such as breeding dogs or growing corn. Repro-rate – rate of reproduction. Stochastic Event: unexpected disaster like a volcano eruption or tornado. (Research geological time) LIVING THINGS: Biology – Study of living things. Living things – all the organisms descended from a single-celled ancestor. * Characteristics:
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7 The Evolution of Living Things Biological evolution explains how populations change over time. SECTION 1 Change over Time . . . . . . . . . . 166 2 How Does Evolution Happen? . . . . . . . . . . . . . . . . . . 174 3 Natural Selection in Action. . . 180 PRE-READING About the Can you find two eyes and a mouth in this photo? The eyes and mouth belong to an adult flounder. Adult flounders swim on their sides and have both eyes on one side of their body. These characteristics allow flounders to lie flat
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EVANS bioscience book - 1‚ 24‚ 25‚ 26‚ 27‚ 50‚ 51‚ 52‚ 53‚ 54‚55 hhe - 10-17 CHAPTER ONE – BIOLOGY AND THE TREE OF LIFE CHAPTER ONE The cell theory and theory of evolution by natural election are unified by ancestry and descent. Evolutionary relationships can be represented by phylogenetic trees Cell Theory Cell – highly organized compartment bounded by plasma membrane containing concentrated chemicals in an aqueous solution Cell Theory – all organisms are made of cells and
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Dragon From Wikipedia‚ the free encyclopedia This article is about the legendary creature. For other uses‚ see Dragon (disambiguation). Dragon Sculpture of Mario the Magnificent‚ dragon mascot of Drexel University‚ US. Mythology Europe and East Asia Grouping Mythology Habitat Mountains‚ seas‚ skies Similar creatures Sirrush‚ Basilisk‚ Wyvern‚ Qilin Carved imperial Chinese dragons at Nine-Dragon Wall‚ Beihai Park‚ Beijing Dragon effigy‚ the Graoully‚ in Metz‚ France A dragon
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HSC BIOLOGY TOPIC 2: BLUEPRINT OF LIFE HSC BIOLOGY TOPIC 2: BLUEPRINT OF LIFE 1) Evidence of evolution suggests that the mechanisms of inheritance‚ accompanied by selection‚ allow change over many generations. 1.1.1 Outline the impact of evolution of plants and animals of: * Changes in physical conditions in the environment * Changes in chemical conditions in the environment * Competition for resources
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Was Darwin Wrong? By David Quammen Evolution by natural selection‚ the central concept of the life’s work of Charles Darwin‚ is a theory. It’s a theory about the origin of adaptation‚ complexity‚ and diversity among Earth’s living creatures. If you are skeptical by nature‚ unfamiliar with the terminology of science‚ and unaware of the overwhelming evidence‚ you might even be tempted to say that it’s "just" a theory. In the same sense‚ relativity as described by Albert Einstein is "just" a theory
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Bio 120: Adaptation & Biodiversity Exam Study Notes (Lectures 12-23) - LECTURE 12: INTRODUCTION TO EVOLUTIONARY BIOLOGY 1. 2. 3. 4. Evolution How it is studied Facts supporting Evolution Biodiversity & adaptation Levels of biological organization: Molecules Æ Cells Æ Organisms Æ Populations Æ Communities Æ Ecosystems Types of questions in evolutionary biology: - Scope: small questions can help towards solving a big question; large questions require multiple lines of evidence
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The Evolution of Life This section provides information about the evolution of life on Earth. For reasons of simplicity some important events and life forms were selected for each geological time span. However this should not give the impression that the evolution of life on Earth is or was a sequential event. Many life forms that were not mentioned in this text were very successful and have evolved or in some cases maintained a very successful life strategy. Prokaryotes‚ for example are the most
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