Life histories
... called an atoke. • During the breeding season a part develops into a sexually “ripe” worm, called an epitoke. • During swarming, which occurs at a precise phase of the moon in October-November, these posterior parts, swollen with gametes, break free, swim to the surface, and, just before sunrise, di ...
... called an atoke. • During the breeding season a part develops into a sexually “ripe” worm, called an epitoke. • During swarming, which occurs at a precise phase of the moon in October-November, these posterior parts, swollen with gametes, break free, swim to the surface, and, just before sunrise, di ...
The Structure of Parasites in Food Webs
... Specifically, parasites that share one host are more likely to share other hosts. Also, a parasite's set of hosts is more likely to be a subset of those of parasites with more hosts. Lastly, a prey and its predator are more likely to be hosts to the same parasite species. Previous models of food web ...
... Specifically, parasites that share one host are more likely to share other hosts. Also, a parasite's set of hosts is more likely to be a subset of those of parasites with more hosts. Lastly, a prey and its predator are more likely to be hosts to the same parasite species. Previous models of food web ...
8 questions - University of San Diego
... e. Annual GDP of about $3,000 dollars per person versus more the $30,000 per person ...
... e. Annual GDP of about $3,000 dollars per person versus more the $30,000 per person ...
SB5 - Bibb County Schools
... 1)Some viral diseases require only one vaccination, which lasts for years. For other diseases like the flu, vaccinations last only one season. The flu vaccine lasts such a short time because the flu virus A) is more easily transmitted B) mutates much more rapidly C) is less dangerous D) is much smal ...
... 1)Some viral diseases require only one vaccination, which lasts for years. For other diseases like the flu, vaccinations last only one season. The flu vaccine lasts such a short time because the flu virus A) is more easily transmitted B) mutates much more rapidly C) is less dangerous D) is much smal ...
lecture 18 - adaptive radiation - Cal State LA
... ~25% of described living species are beetles (flying insects) ...
... ~25% of described living species are beetles (flying insects) ...
Name: Class: Date: The Evolution of Populations Vocabulary
... separated due to differences in courtship or mating rituals 8. Species from two populations are separated due to differences in the timing of their reproduction ...
... separated due to differences in courtship or mating rituals 8. Species from two populations are separated due to differences in the timing of their reproduction ...
Section 2.1 Summary – pages 35 - 45
... Symbiosis Predator and Prey • Predators seek out and eat other organisms. • Predation is found in all ecosystems and includes organisms that eat plants and animals. ...
... Symbiosis Predator and Prey • Predators seek out and eat other organisms. • Predation is found in all ecosystems and includes organisms that eat plants and animals. ...
Evolutionary Classification
... Even though they do not look a like, crabs & barnacles are actually related ...
... Even though they do not look a like, crabs & barnacles are actually related ...
Evolution - PowerPoint
... that survive happen to have a gene that protects them from the pesticide. These surviving insects pass on this resistant gene to their offspring. Each time the corn is sprayed, more resistant grasshoppers enter the population. Eventually the entire population will be resistant, making the pesticid ...
... that survive happen to have a gene that protects them from the pesticide. These surviving insects pass on this resistant gene to their offspring. Each time the corn is sprayed, more resistant grasshoppers enter the population. Eventually the entire population will be resistant, making the pesticid ...
B12-A Interdependency
... insects may lay eggs on a host, allowing larvae to feed on the host when they are born. Parasites typically harm, but do not kill, their hosts. It is in the parasite’s best interest to keep its source of nutrients well enough to stay alive. When the host dies, the parasite is forced to find another v ...
... insects may lay eggs on a host, allowing larvae to feed on the host when they are born. Parasites typically harm, but do not kill, their hosts. It is in the parasite’s best interest to keep its source of nutrients well enough to stay alive. When the host dies, the parasite is forced to find another v ...
Document
... successfully. During the breeding season, some species occupy small territories called leks, which are used solely ...
... successfully. During the breeding season, some species occupy small territories called leks, which are used solely ...
Species and Speciation
... only attract females of their species Flowers that release pollen in the spring are reproductively isolated from flowers that release pollen in the summer. The mountain bluebird lives at high elevations while the eastern bluebird lives a lower ones Male and female genetalia of each species are uniqu ...
... only attract females of their species Flowers that release pollen in the spring are reproductively isolated from flowers that release pollen in the summer. The mountain bluebird lives at high elevations while the eastern bluebird lives a lower ones Male and female genetalia of each species are uniqu ...
Plant of the Day
... The continual evolutionary change by a species that is necessary to retain its place in an ecosystem because of ongoing co-evolution by other species (and it’s environment) Physical and biotic aspects of the environment of any species are forever in flux, with subtle changes in annual temperature an ...
... The continual evolutionary change by a species that is necessary to retain its place in an ecosystem because of ongoing co-evolution by other species (and it’s environment) Physical and biotic aspects of the environment of any species are forever in flux, with subtle changes in annual temperature an ...
Ecosystems and Communities
... it obtains it, and which other species use the organism as food. It also includes the physical conditions it requires to survive and it includes when and how it reproduces. Everything an organism does to survive! ...
... it obtains it, and which other species use the organism as food. It also includes the physical conditions it requires to survive and it includes when and how it reproduces. Everything an organism does to survive! ...
Gleason
... • Another criterion for distinguishing a compound from a mixture is that the constituents of a mixture can usually be separated by simple means, but the components of a compound can only be separated by a chemical reaction. ...
... • Another criterion for distinguishing a compound from a mixture is that the constituents of a mixture can usually be separated by simple means, but the components of a compound can only be separated by a chemical reaction. ...
Ecological Communities
... service from the cleaners at their cleaning station! There are some very interesting social interactions here, akin to the “reputation” hypothesis of altruism. Cleaners remove parasites, but they can also take bites out of their hosts! Fish watch, and go to cleaners that ‘cheat’ less. In addition, t ...
... service from the cleaners at their cleaning station! There are some very interesting social interactions here, akin to the “reputation” hypothesis of altruism. Cleaners remove parasites, but they can also take bites out of their hosts! Fish watch, and go to cleaners that ‘cheat’ less. In addition, t ...
From to the : A Three-Part Co-op in Wildlife Biology
... study on the effects of rotational cattle grazing on local grassland songbird ecology. The study was in a small, rural town of central Montana where a large portion of the land is dedicated to ranching. ...
... study on the effects of rotational cattle grazing on local grassland songbird ecology. The study was in a small, rural town of central Montana where a large portion of the land is dedicated to ranching. ...
27 - Faculty Sites
... population size and distribution of each (continued) – Chthamalus dominates the upper intertidal zone and Balamus dominates the middle intertidal zone – The middle habitat is suitable for both species – When Connell scraped off Balamus, the Chthamalus population increased, spreading downward into th ...
... population size and distribution of each (continued) – Chthamalus dominates the upper intertidal zone and Balamus dominates the middle intertidal zone – The middle habitat is suitable for both species – When Connell scraped off Balamus, the Chthamalus population increased, spreading downward into th ...
Worksheets MUST be hand written and will not be accepted
... Worksheets MUST be hand written and will not be accepted as a typed document. 1. What is an adaptive trait? Give two examples. ...
... Worksheets MUST be hand written and will not be accepted as a typed document. 1. What is an adaptive trait? Give two examples. ...
Speciation & Patterns of Evolution
... 5.Multicellular eukaryotes evolved 1.2 billion years ago 6.Plants, fungi, and animals colonized the land about 500 million years ago. ...
... 5.Multicellular eukaryotes evolved 1.2 billion years ago 6.Plants, fungi, and animals colonized the land about 500 million years ago. ...
27-Population-Community
... A community is often identified by the presence of its dominant species The distribution of the other organisms may differ a good deal; however, the ranges of all organisms overlap ...
... A community is often identified by the presence of its dominant species The distribution of the other organisms may differ a good deal; however, the ranges of all organisms overlap ...
Chapter 29
... populations of plants and animals exist in balance with each other and the environment. ...
... populations of plants and animals exist in balance with each other and the environment. ...
ABS ecologoical fundamentals winter 2011
... • First protocells form in the sea • Single-cell prokaryotes form in the sea • Single-cell eukaryotes form in the seas • Multicellular organisms form in the seas, later on land ...
... • First protocells form in the sea • Single-cell prokaryotes form in the sea • Single-cell eukaryotes form in the seas • Multicellular organisms form in the seas, later on land ...
Predation & Competition
... • Resources are limited (e.g space, food, water) – The ability of organisms to gain resources will determine their success. ...
... • Resources are limited (e.g space, food, water) – The ability of organisms to gain resources will determine their success. ...
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.