On the Origin of Species
... time scale differences The time interval over which change occurs is small relative to the ‘lifespan’ of the species or group. ...
... time scale differences The time interval over which change occurs is small relative to the ‘lifespan’ of the species or group. ...
Learning Objectives
... According to one hypothetical scenario, there were four main stages in this process: 1. The abiotic synthesis of small organic molecules (monomers) 2. The joining of monomers into macromolecules 3. The packaging of these molecules into “protobionts,” droplets with membranes that maintained a distinc ...
... According to one hypothetical scenario, there were four main stages in this process: 1. The abiotic synthesis of small organic molecules (monomers) 2. The joining of monomers into macromolecules 3. The packaging of these molecules into “protobionts,” droplets with membranes that maintained a distinc ...
draft cover letter to science
... most of the last 50 million years, radiated from that continent, and were diverse on it until the late Pleistocene (Table 1,56). Feral horses and burros are widely viewed as ecological pests, but in the context of historical ecology they are plausible analogs for extinct equids (35). Although the e ...
... most of the last 50 million years, radiated from that continent, and were diverse on it until the late Pleistocene (Table 1,56). Feral horses and burros are widely viewed as ecological pests, but in the context of historical ecology they are plausible analogs for extinct equids (35). Although the e ...
chapter 12 - Geoclassroom Home
... fossil record. The lack of hard parts before the Cambrian explosion means that there are fewer soft-bodied specimens preserved in the fossil record, not that the life forms didn’t exist. It is possible that the Cambrian is a recording of the diversity of life that was already present—but that didn’t ...
... fossil record. The lack of hard parts before the Cambrian explosion means that there are fewer soft-bodied specimens preserved in the fossil record, not that the life forms didn’t exist. It is possible that the Cambrian is a recording of the diversity of life that was already present—but that didn’t ...
Master 1.1 and 1.3 Re-wilding North America /Reintroduction of
... humans had been living in North America for several thousand years prior to Columbus. The impact of humans on North American flora and fauna is still being debated, but there is little doubt that humans did have an effect prior to 1492. ...
... humans had been living in North America for several thousand years prior to Columbus. The impact of humans on North American flora and fauna is still being debated, but there is little doubt that humans did have an effect prior to 1492. ...
04 Climate Change LO.10
... 1) change in population size due to decreased birth rate or increased death rate 2) extinction If adjust by evolution 3) adaptation via natural selection (assumes trait is heritable) Must have pre-adaptation; genetic variation doesn’t arise from necessity. Select appropriate genotypes for change in ...
... 1) change in population size due to decreased birth rate or increased death rate 2) extinction If adjust by evolution 3) adaptation via natural selection (assumes trait is heritable) Must have pre-adaptation; genetic variation doesn’t arise from necessity. Select appropriate genotypes for change in ...
Late Quaternary Extinctions: State of the Debate
... Between fifty and ten thousand years ago, most large mammals became extinct everywhere except Africa. Slow-breeding animals also were hard hit, regardless of size. This unusual extinction of large and slow-breeding animals provides some of the strongest support for a human contribution to their exti ...
... Between fifty and ten thousand years ago, most large mammals became extinct everywhere except Africa. Slow-breeding animals also were hard hit, regardless of size. This unusual extinction of large and slow-breeding animals provides some of the strongest support for a human contribution to their exti ...
final1-final-report-publishable-summary
... The main results of the project are those that have come from the modelling, the mesocosm experiments and the analysis of the long term lake time series. The initial modelling of the system specific 3 species community predicted that even a small switch away of the primary predator consuming the sha ...
... The main results of the project are those that have come from the modelling, the mesocosm experiments and the analysis of the long term lake time series. The initial modelling of the system specific 3 species community predicted that even a small switch away of the primary predator consuming the sha ...
The Fossil Record and Geological Time
... the Galapagos, opens new environments for founders that reach the outposts, and adaptive radiation fills many of the available niches with new species. • In a global scale, continental drift is the major geographical factor correlated with the spatial distribution of life and evolutionary episodes a ...
... the Galapagos, opens new environments for founders that reach the outposts, and adaptive radiation fills many of the available niches with new species. • In a global scale, continental drift is the major geographical factor correlated with the spatial distribution of life and evolutionary episodes a ...
Chapter 37
... water vapor retain heat, raising atmospheric temperature. Greenhouse effect Burning fossil fuels increases CO2 in the atmosphere. ...
... water vapor retain heat, raising atmospheric temperature. Greenhouse effect Burning fossil fuels increases CO2 in the atmosphere. ...
Geography of Communities
... organisms than for larger ones. A mouse needs about 25 times more energy per gram of body mass than an elephant. ...
... organisms than for larger ones. A mouse needs about 25 times more energy per gram of body mass than an elephant. ...
APES – Ch. 4-6 Study Guide
... 1. Briefly describe the evolution of life from chemical evolution to the development of eukaryotic cells. 2. Describe the tools available to researchers for learning the evolutionary history of life. 3. Briefly describe the theory of evolution, being sure to include the roles played by variation wit ...
... 1. Briefly describe the evolution of life from chemical evolution to the development of eukaryotic cells. 2. Describe the tools available to researchers for learning the evolutionary history of life. 3. Briefly describe the theory of evolution, being sure to include the roles played by variation wit ...
Major Trends in Evolution
... • Large scale evolutionary changes that separate genera, families, orders, classes and even phyla of organisms • Macro = Large ...
... • Large scale evolutionary changes that separate genera, families, orders, classes and even phyla of organisms • Macro = Large ...
Exam_ final question.. - The Department of Ecology and
... conditions or alternative tactics used by different males in the same population. Using examples from salamanders, frogs, lizards, and snakes, discuss the evolution of plasticity in mating tactics of males, both within and between populations. What is the role of sperm competition in the evolution o ...
... conditions or alternative tactics used by different males in the same population. Using examples from salamanders, frogs, lizards, and snakes, discuss the evolution of plasticity in mating tactics of males, both within and between populations. What is the role of sperm competition in the evolution o ...
Late Quaternary Extinctions: State of the Debate
... continent. The timing of extinction for each genus was judged as robust or provisional based on previous publications that evaluated quality of dates (see Barnosky et al. 2004b). For humans, the earliest generally accepted arrival of Homo sapiens sapiens is indicated. Pre-sapiens hominins were prese ...
... continent. The timing of extinction for each genus was judged as robust or provisional based on previous publications that evaluated quality of dates (see Barnosky et al. 2004b). For humans, the earliest generally accepted arrival of Homo sapiens sapiens is indicated. Pre-sapiens hominins were prese ...
Population ppt - Summit School District
... The population size of a species in a given space at a given time is determined by the interplay between BIOTIC POTENTIAL and ENVIRONMENTAL RESISTANCE. Biotic potential = growth rate with unlimited resources. Environmental resistance = all the factors acting jointly to limit population growth. ...
... The population size of a species in a given space at a given time is determined by the interplay between BIOTIC POTENTIAL and ENVIRONMENTAL RESISTANCE. Biotic potential = growth rate with unlimited resources. Environmental resistance = all the factors acting jointly to limit population growth. ...
chapter 34
... All of the 30 or so species of hagfishes are marine scavengers, feeding on worms and sick or dead fish. Rows of slime glands along a hagfish’s body produce small amounts of slime perhaps to repulse other scavengers or larger amounts to deter a potential predator. ...
... All of the 30 or so species of hagfishes are marine scavengers, feeding on worms and sick or dead fish. Rows of slime glands along a hagfish’s body produce small amounts of slime perhaps to repulse other scavengers or larger amounts to deter a potential predator. ...
34_DetailLectOutjk_AR
... All of the 30 or so species of hagfishes are marine scavengers, feeding on worms and sick or dead fish. Rows of slime glands along a hagfish’s body produce small amounts of slime perhaps to repulse other scavengers or larger amounts to deter a potential predator. ...
... All of the 30 or so species of hagfishes are marine scavengers, feeding on worms and sick or dead fish. Rows of slime glands along a hagfish’s body produce small amounts of slime perhaps to repulse other scavengers or larger amounts to deter a potential predator. ...
I Unit 9 PPT
... Fossil skeletons show that early mammals had large eye sockets, which may have meant that they were active at night. Mammals did not compete with dinosaurs for food, and fed primarily on insects. ...
... Fossil skeletons show that early mammals had large eye sockets, which may have meant that they were active at night. Mammals did not compete with dinosaurs for food, and fed primarily on insects. ...
Organismal Biology/25A2-FosilRecrdGeologicTime
... • This event defines the boundary between the Mesozoic and Cenozoic eras. ...
... • This event defines the boundary between the Mesozoic and Cenozoic eras. ...
Chapter 36: Comparing Vertebrates
... Main body muscles are arranged into blocks that are positioned on either side of the vertebral column Contract in waves, one after another Make the body bend rapidly back and forth Amphibians, reptiles, birds, and mammals The position of the limbs relative to the body shifts toward the cente ...
... Main body muscles are arranged into blocks that are positioned on either side of the vertebral column Contract in waves, one after another Make the body bend rapidly back and forth Amphibians, reptiles, birds, and mammals The position of the limbs relative to the body shifts toward the cente ...
Megafauna
In terrestrial zoology, megafauna (Ancient Greek megas ""large"" + New Latin fauna ""animal"") are large or giant animals. The most common thresholds used are 45 kilograms (100 lb) or 100 kilograms (220 lb). This thus includes many species not popularly thought of as overly large, such as white-tailed deer, red kangaroo, and humans.In practice, the most common usage encountered in academic and popular writing describes land animals roughly larger than a human that are not (solely) domesticated. The term is especially associated with the Pleistocene megafauna – the land animals often larger than modern counterparts considered archetypical of the last ice age, such as mammoths, the majority of which in northern Eurasia, the Americas and Australia became extinct as recently as 10,000–40,000 years ago. It is also commonly used for the largest extant wild land animals, especially elephants, giraffes, hippopotamuses, rhinoceroses, and large bovines. Megafauna may be subcategorized by their trophic position into megaherbivores (e.g., elk), megacarnivores (e.g., lions), and, more rarely, megaomnivores (e.g., bears).Other common uses are for giant aquatic species, especially whales, any larger wild or domesticated land animals such as larger antelope and cattle, as well as numerous dinosaurs and other extinct giant reptilians.The term is also sometimes applied to animals (usually extinct) of great size relative to a more common or surviving type of the animal, for example the 1 m (3 ft) dragonflies of the Carboniferous period.