11.6 Patterns in Evolution
... • Mass extinctions are rare but much more intense. – destroy many species at global level – thought to be caused by catastrophic events – at least five mass extinctions in last 600 million years ...
... • Mass extinctions are rare but much more intense. – destroy many species at global level – thought to be caused by catastrophic events – at least five mass extinctions in last 600 million years ...
File
... reptiles, fishes, birds and mammals, a role which they share with most other insects, beetles play other important roles in the environment. ...
... reptiles, fishes, birds and mammals, a role which they share with most other insects, beetles play other important roles in the environment. ...
11_Coevol
... Predator-Prey, Host-Parasite Coevolution • Bat predators are specifically tuned to the songs of their frog prey. ...
... Predator-Prey, Host-Parasite Coevolution • Bat predators are specifically tuned to the songs of their frog prey. ...
savanna - BealBio
... water due to drought, poaching, development, and any other natural disasters. ...
... water due to drought, poaching, development, and any other natural disasters. ...
Competition
... same niche in exactly the same habitat at exactly the same time. One will always exclude the other. ...
... same niche in exactly the same habitat at exactly the same time. One will always exclude the other. ...
Evolutionary Theory
... frequently than others. (genetic drift). If a species of insect can have white or brown eyes, and both are equally beneficial, then just by chance more insects are born with brown eyes during a season. How would this affect the gene pool? Would genetic drift affect small or large populations more? ...
... frequently than others. (genetic drift). If a species of insect can have white or brown eyes, and both are equally beneficial, then just by chance more insects are born with brown eyes during a season. How would this affect the gene pool? Would genetic drift affect small or large populations more? ...
Chpt.4 Environmental Science
... – Natural selection members of a population that are best suited for a particular environment will survive and produce ...
... – Natural selection members of a population that are best suited for a particular environment will survive and produce ...
Lecture #11 Date
... laboratory, the genetic divergence between the species is likely to be small. This suggests that speciation in nature has occurred relatively recently. ...
... laboratory, the genetic divergence between the species is likely to be small. This suggests that speciation in nature has occurred relatively recently. ...
Food Web activity guidance
... (Optional) Each student gets a card about an organism, and makes a drawing of the creature shown on their card. Working together, students arrange the cards or pictures into a food web. First the cards need sorting into three rows, plants, herbivores and carnivores. When an animal eats both plants A ...
... (Optional) Each student gets a card about an organism, and makes a drawing of the creature shown on their card. Working together, students arrange the cards or pictures into a food web. First the cards need sorting into three rows, plants, herbivores and carnivores. When an animal eats both plants A ...
Plants that Provide Refugia* for Wildlife
... due to Colony Collapse Disorder. • Proximity to native habitat increases the number of native bee visits Kremen et.al. 2002 ...
... due to Colony Collapse Disorder. • Proximity to native habitat increases the number of native bee visits Kremen et.al. 2002 ...
ECOLOGY AND BEHAVIOR
... ● Primary productivity: Term for the rate which producers photosynthesize organic compounds in ...
... ● Primary productivity: Term for the rate which producers photosynthesize organic compounds in ...
Idea of Evolution
... populations of organisms change over time Also believed in biogenesis of simple organisms Proposed that individuals acquire traits during lifetime from behavior and pass them onto offspring Called Theory of Acquired Traits ...
... populations of organisms change over time Also believed in biogenesis of simple organisms Proposed that individuals acquire traits during lifetime from behavior and pass them onto offspring Called Theory of Acquired Traits ...
Chapter 1 Lesson 3 Vocab Ecology
... Competition the struggle between organisms to survive Examples: ...
... Competition the struggle between organisms to survive Examples: ...
ARE ALIEN PLANTS THE ECOLOGICAL EQUIVALENTS OF
... alien plants over 2 years in Newark, DE. Insects were sampled by collecting whole plants in bags, bringing bagged plant samples into the lab, and removing the insects. Insects were identified to ...
... alien plants over 2 years in Newark, DE. Insects were sampled by collecting whole plants in bags, bringing bagged plant samples into the lab, and removing the insects. Insects were identified to ...
Chapter 4 The Organization of Life
... interact with each other. • Every population is part of a community. • The most obvious difference between communities is the types of species they have. • Land communities are often dominated by a few species of plants. These plants then determine what other organisms can live in that community. ...
... interact with each other. • Every population is part of a community. • The most obvious difference between communities is the types of species they have. • Land communities are often dominated by a few species of plants. These plants then determine what other organisms can live in that community. ...
Patterns of Evolution
... curve. Selection pressure may favor one extreme or the other and move the entire curve in one direction. For example, if there is continuous variation in pigmentation and dark pigmentation is favored by selective pressure, then the population will - over time become darker. This is an example of dir ...
... curve. Selection pressure may favor one extreme or the other and move the entire curve in one direction. For example, if there is continuous variation in pigmentation and dark pigmentation is favored by selective pressure, then the population will - over time become darker. This is an example of dir ...
Chapter 49 – The Biosphere and Biomes
... 8. Explain how resource partitioning may allow competitors to coexist, and in fact, drive evolutionary change within a population using the example discussed in Figure 44.6. 9. Explain how consumer-resource interactions can lead to an “evolutionary arms race.” 10. Describe several defense mechanisms ...
... 8. Explain how resource partitioning may allow competitors to coexist, and in fact, drive evolutionary change within a population using the example discussed in Figure 44.6. 9. Explain how consumer-resource interactions can lead to an “evolutionary arms race.” 10. Describe several defense mechanisms ...
Interrelationships Between Organisms
... • As the prey population increases, predator population increases. • As the predator population increases, the prey population decreases. ...
... • As the prey population increases, predator population increases. • As the predator population increases, the prey population decreases. ...
Insect Taxonomic Diversity
... The Hymenoptera include famous examples of social insects, such as honeybees and true ants; these insects have developed regimented social systems in which members are divided into worker, drone, and queen caste. ...
... The Hymenoptera include famous examples of social insects, such as honeybees and true ants; these insects have developed regimented social systems in which members are divided into worker, drone, and queen caste. ...
Coevolution
In biology, coevolution is ""the change of a biological object triggered by the change of a related object"". In other words, when changes in at least two species' genetic compositions reciprocally affect each other’s evolution, coevolution has occurred.There is evidence for coevolution at the level of populations and species. Charles Darwin briefly described the concept of coevolution in On the Origin of Species (1859) and developed it in detail in Fertilisation of Orchids (1862). It is likely that viruses and their hosts coevolve in various scenarios.However, there is little evidence of coevolution driving large-scale changes in Earth's history, since abiotic factors such as mass extinction and expansion into ecospaces seem to guide the shifts in the abundance of major groups. One proposed specific example was the evolution of high-crowned teeth in grazers when grasslands spread through North America - long held up as an example of coevolution. We now know that these events happened independently.Coevolution can occur at many biological levels: it can be as microscopic as correlated mutations between amino acids in a protein or as macroscopic as covarying traits between different species in an environment. Each party in a coevolutionary relationship exerts selective pressures on the other, thereby affecting each other's evolution. Coevolution of different species includes the evolution of a host species and its parasites (host–parasite coevolution), and examples of mutualism evolving through time. Evolution in response to abiotic factors, such as climate change, is not biological coevolution (since climate is not alive and does not undergo biological evolution).The general conclusion is that coevolution may be responsible for much of the genetic diversity seen in normal populations including: blood-plasma polymorphism, protein polymorphism, histocompatibility systems, etc.The parasite/host relationship probably drove the prevalence of sexual reproduction over the more efficient asexual reproduction. It seems that when a parasite infects a host, sexual reproduction affords a better chance of developing resistance (through variation in the next generation), giving sexual reproduction viability for fitness not seen in the asexual reproduction, which produces another generation of the organism susceptible to infection by the same parasite.Coevolution is primarily a biological concept, but researchers have applied it by analogy to fields such as computer science, sociology / international political economy and astronomy.