Community- Ecology Class

Biology
Tutor: None Selected Time limit: 1 Day

     What is the difference between true parasitism and social parasitism?    In what sense is the evolutionary relationships between predators and their prey like the “Arms Race” between different countries like America and Russia?

Apr 22nd, 2015

Social parasites show a great diversity of adaptations to their specialized lifestyle. Interactions with hosts take place on various levels, resulting in a multitude of characters that allow the parasites to exploit their hosts more efficiently, and various counter-adaptations that induce a higher degree of resistance in hosts.Social parasites show a great diversity of adaptations to their specialized lifestyle. Interactions with hosts take place on various levels, resulting in a multitude of characters that allow the parasites to exploit their hosts more efficiently, and various counter-adaptations that induce a higher degree of resistance in hosts.Social parasites show a great diversity of adaptations to their specialized lifestyle. Interactions with hosts take place on various levels, resulting in a multitude of characters that allow the parasites to exploit their hosts more efficiently, and various counter-adaptations that induce a higher degree of resistance in hosts.

Social parasitism is mixobiotic and dependent relation; specifically:  the relation of various ants that lack a worker caste to other kinds of ants within whose nests they dwell and upon whom they depend for all the services normally performed by a species' own workers.

A True  parasite is usually much smaller than its host, lives a shorter period of time, often reproduces within (or on) its host, and often does not kill its host. Examples are tapeworms and human body lice.

Horrible puns aside, co-evolution, the evolutionary arms race is a deadlock between predator and prey, each one trying to gain an evolutionary advantage over the other. Take the relation between the cheetah and gazelle for example. The cheetah, a predator adapted for stealthy and speed, against it a gazelle would be easy prey, if it were not for the gazelle’s own adaptations. 

Predator and prey evolve together. The prey is part of the predator's environment, and the predator dies if it does not get food, so it evolves whatever is necessary in order to eat the prey.Likewise, the predator is part of the prey's environment, and the prey dies if it is eaten by the predator, so it evolves whatever is necessary to avoid being eaten.Co-evolutionary changes in species may reverse traditional predator-prey population cycles, creating the appearance that prey are eating the predators.


Apr 22nd, 2015

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Apr 22nd, 2015
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Apr 22nd, 2015
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