Biology 12

Ancestral Lasan finch Akialoa Akepa Oahu Extinct mamo Molokai Maui Hawaii Crested honeycreeper Apapane Grosbeak finch Lanai Kaho ...

THINKING LAB Genetic Diversity and Fish Hatcheries Background Fish hatcheries have helped to preserve fish stocks for commercial ...

Chapter 11 Mechanisms of Evolution • MHR 383 similar sized. Assortative mating is the basis of artificial selection, in which an ...

384 MHR • Unit 4 Evolution Global climate change may also cause directional selection in some populations. Imagine that a hypoth ...

Chapter 11 Mechanisms of Evolution • MHR 385 Figure 11.17In disruptive selection, two extreme phenotypes are favoured over the i ...

386 MHR • Unit 4 Evolution Since sexual reproduction mixes the genes from both parents, any ability to fight off parasites or di ...

Chapter 11 Mechanisms of Evolution • MHR 387 CHAPTER 11 REVIEW Summary of Expectations Macro-evolution is evolution on a grand ...

388 MHR • Unit 4 Evolution 21.Plan an experiment or model that explains gene flow. 22.Devise a demonstration using coins, poker ...

Chapter 11 Mechanisms of Evolution • MHR 389 COMMUNICATING 26.Create a diagram that shows how non-random mating can increase the ...

CHAPTER 12 Reflecting Questions Adaptation and Speciation 390 From the bacteria that thrive in your digestive tract, to a specie ...

391 Chapter Contents 12.1 Adaptation 392 MiniLab: Small Changes, Large Gains 394 12.2 How Species Form 398 Thinking Lab: Leopard ...

12.1 Adaptation 392 MHR • Unit 4 Evolution The broad, flat leaves of a maple tree and the spines of a cactus are features that e ...

Chapter 12 Adaptation and Speciation • MHR 393 Adaptations may occur as particular variations increase in frequency within a pop ...

MINI LAB 394 MHR • Unit 4 Evolution Primitive eyes were simply a cluster of light- sensitive cells. These rudimentary “eyes” pro ...

Chapter 12 Adaptation and Speciation • MHR 395 The Changing Function of Adaptations Sometimes an adaptation that evolved for one ...

396 MHR • Unit 4 Evolution Cryptic coloration makes potential prey difficult to spot. For example, animals may have colouring th ...

Chapter 12 Adaptation and Speciation • MHR 397 Is Evolution Perfection? It is sometimes assumed that the result of adaptation an ...

12.2 How Species Form 398 MHR • Unit 4 Evolution The meadowlarks in Figure 12.7 look remarkably similar, yet they are different ...

Chapter 12 Adaptation and Speciation • MHR 399 Speciation, the formation of species, is a continuous process. Examples of specia ...

400 MHR • Unit 4 Evolution Temporal isolation Many species are kept separate by temporal (timing) barriers. For example, two spe ...