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BIOL 206 Chp 10 Life History Strategies
Terms in this set (25)
life history strategy
The suite of life history traits adaptive in a particular ecological context.
reproductive value (Vx)
The expected reproductive contribution to the next generation of an individual of age x.
The ability of an organism to produce different phenotypes in different environments.
A process in which the adult develops from the fertilized egg without a larval stage.
A developmental pattern that includes a larval stage.
The attainment of functional sexuality by larval forms that do not undergo metamorphosis.
An embryonic stage in which the embryo does not implant in the uterus and suspends development.
Describe a pattern of sequential hermaphroditism in which male function develops first.
Describes a pattern of sequential hermaphroditism in which female function develops first.
The number of offspring produced. It can be measured for a single reproductive event or over the life span.
reactive oxygen species (ROS)
Oxygen ions and peroxides produced in normal metabolic activity that are toxic to the cell.
The actions of a single gene that affect more than one phenotypic trait.
A mode of reproduction in which offspring arise from a single parent and inherit its genes directly.
cost of meiosis
The reduction in genetic contribution to the offspring in sexual species.
The total parental expenditure of energy on offspring through the numbers and size of offspring, and their care, feeding, and defense
Describes a reproductive strategy in which females reproduce more than once over the life span.
A reproductive strategy in which a female reproduces once in the life span. Also called big bang reproduction.
The surprisingly small difference between the total lifetime reproductive outputs of annuals and perennials.
residual reproductive value
The remaining reproductive value of an individual after the current reproductive effort.
In Grime's classification of plant strategies, a plant that is limited more by competition than other factors.
In Grime's classification of plant strategies, a plant that inhabits physically demanding environments.
In Grime's classification of plant strategies, a plant that experiences low stress but high levels of disturbance of the habitat.
A life history strategy in which an organism produces many offspring with little energetic investment in each.
A life history strategy in which the reproductive strategy emphasizes the investment of a large amount of energy in a small number of offspring.
The idea that organisms that experience unpredictable environments should reduce variation in fitness by spreading out the risk of reproductive failure.
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