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The General Principles of the Theory of Natural Selection

The General Principles of the Theory of Natural Selection

The General Principles of the Theory of Natural Selection. 1. There is natural variation in the populations of all organisms. Individual variation in the Grevy’s Zebra ( Equus grevyi) look closely at the patterns of each individual zebra, they are all different .

By ryanadan
(316 views)

Evolution

Evolution

Evolution. Evolution. What is evolution? It is the process of biological change by which descendents come to differ from their ancestors. Scientists. Scientists who began studying evolution: Linnaeus (1700’s) Developed classification system of organisms

By paul
(327 views)

Review and Animal Behavior

Review and Animal Behavior

Review and Animal Behavior. Animal behavior. Examples? Definition Why study behavior?. How to study animal behavior. Ethology: The study of animal behavior in its natural environment Mid 20 th century Tinbergen, von Frisch, Lorenz 4 foundational questions

By lotus
(465 views)

Hardy-Weinberg equilibrium describes populations that are not evolving .

Hardy-Weinberg equilibrium describes populations that are not evolving .

HMD Bio Chapter 11 Section 4 KEY CONCEPT Hardy-Weinberg equilibrium provides a framework for understanding how populations evolve. Hardy-Weinberg equilibrium describes populations that are not evolving. Biologists use models to study populations.

By bobby
(168 views)

Unit 8 Organization of Life, Plants, and Evolution

Unit 8 Organization of Life, Plants, and Evolution

Unit 8 Organization of Life, Plants, and Evolution. What is Evolution?. Darwin’s Theory of Evolution (Chapter 15) A. Charles Darwin In 1831 Charles Darwin took a trip to the Galapagos Islands as a naturalist aboard

By minty
(519 views)

Sexual Selection

Sexual Selection

Sexual Selection. Darwin & Evolution. Evolution by natural selection Struggle for existence Adaptations increase individual survival. Darwin. The sight of a feather in a peacock’s feather, whenever I gaze at it, makes me sick. Hmm what’s that about…. Darwin on Sex… .

By zipporah
(146 views)

Process of Evolution

Process of Evolution

Process of Evolution. Outline. Evolution in a Genetic Context - Microevolution Hardy-Weinberg Causes of Microevolution Natural Selection Types of Selection Maintenance of Variations Speciation Modes of Speciation. Evolution in a Genetic Context. Microevolution

By siran
(258 views)

The General Principles of the Theory of Natural Selection

The General Principles of the Theory of Natural Selection

The General Principles of the Theory of Natural Selection. 1. There is natural variation in the populations of all organisms. Individual variation in the Grevy’s Zebra ( Equus grevyi) look closely at the patterns of each individual zebra, they are all different .

By wells
(112 views)

E volution of Species

E volution of Species

E volution of Species. Microevolution vs . Macroevolution. Microevolution: Survival through the inheritance of favorable characteristics Changes occur in gene pools due to mutation, natural selection, genetic drift, etc.

By cruz
(238 views)

Natural Selection Survival	 Mating Success 	 Parental 					 Care Intrasexual	 Mate Choice 	Competition	(Epiga

Natural Selection Survival Mating Success Parental Care Intrasexual Mate Choice Competition (Epiga

Natural Selection Survival Mating Success Parental Care Intrasexual Mate Choice Competition (Epigamic). Sexual Selection. Sexual Selection. Intrasexual Selection. Epigamic Selection. Intrasexual or Epigamic Selection? Or both?.

By laasya
(114 views)

Darren Monckton

Darren Monckton

Darren Monckton. sexual selection of male horn size in Soay sheep. inter-sex sexual selection. intra-sex sexual selection. natural selection should drive a sexually selected feature to fixation?. • why are many sexually selected traits not driven to fixation?.

By aden
(94 views)

Lecture 4 The central role of parasites in evolution

Lecture 4 The central role of parasites in evolution

Lecture 4 The central role of parasites in evolution. Today:. Case study I: Parasite Red Queen and the advantage of sex Case study II: How the Peacock got its tail? Sexual selection and parasites.

By arnie
(185 views)

Next week’s lab: Stream Ecology

Next week’s lab: Stream Ecology

EXAM 1 next Tuesday 12:30 here Lectures/Chapters thru Thursday Practice exam with answers : On course website on Exam date Format: Choice of ?s to answer Longer: 4 of 5 (interpret figures) Shorter: 4 of 6 Questions?. 6. Next week’s lab: Stream Ecology.

By lou
(130 views)

Diversity of reproduction

Diversity of reproduction

Diversity of reproduction. Asexual reproduction Parthenogenesis Hermaphrodites Sequential hermaphrodites - protogyny (F  M) or protoandry (M  F) Sexual reproduction. Male/female reproductive strategy.

By materia
(201 views)

Finicky Females and Macho Males: Sexual Selection in Two Arthropods

Finicky Females and Macho Males: Sexual Selection in Two Arthropods

Finicky Females and Macho Males: Sexual Selection in Two Arthropods. Vik Iyengar Department of Biology Villanova University. Sexual Selection. Fundamental question that troubled Darwin Why do some males have such gaudy traits that would appear to decrease survival?

By aphrodite
(166 views)

Chapter 23 – The Evolution of Populations

Chapter 23 – The Evolution of Populations

Chapter 23 – The Evolution of Populations. Population Genetics. Microevolution – change in the genetic makeup of a population from generation to generation Population genetics – the study of how populations change genetically over time

By charlot
(186 views)

Part 3 From individual behaviour to social systems

Part 3 From individual behaviour to social systems

Part 3 From individual behaviour to social systems. 鄭先祐 (Ayo) 國立台南大學 環境與生態學院. Part 3 Social systems. Chap. 7 The evolution of animal signals Chap. 8 Sexual selection and mate choice Chap. 9 Sociality and kin selection in insects Chap.10 Predicting family dynamics in social vertebrates

By onawa
(121 views)

Allele Frequencies and Genetic Equilibrium

Allele Frequencies and Genetic Equilibrium

Allele Frequencies and Genetic Equilibrium. (Population Genetics). Allele Frequencies. How common certain alleles are in a population of organisms Example:

By tavi
(222 views)

Mate choice and sexual selection: integrating research on humans and other species

Mate choice and sexual selection: integrating research on humans and other species

Mate choice and sexual selection: integrating research on humans and other species. What is it about?. Bringing together researchers... who work on different species who might not attend the same conferences who examine different questions who use different methods. Outcomes?.

By octavio
(126 views)

Popper: Falsificationism

Popper: Falsificationism

Popper: Falsificationism. From “falsifiability” as the criterion that distinguishes science from “pseudo-science” to “falsificationism” as a model of scientific method/reasoning.

By faris
(229 views)

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