Chapter 7 Flashcards
The major events relating to an organisms growth, development, reproduction, and survival; these events include the age and size of first reproduction, the amount and timing of reproduction, and longevity.
life history
The overall pattern in the timing and nature of life history events, averaged across all the individuals of a species.
life history strategy
The ability of a single genotype to produce different phenotypes under different environmental conditions
phenotypic plasticity
Discrete phenotypes with few or no intermediate forms.
morphs
The relative amounts of energy or resources that an organism devotes to different functions.
allocation
Differential growth of body parts that results in a change in shape or proportion with size.
allometry
There are at least two distinct stages that differ in their habitat, physiology, or morphology.
complex life cycle
An abrupt transition in form from the larval to the juvenile stage that is sometimes accompanied with a change in habitat.
metamorphosis
A simple life cycle that goes directly from fertilized egg to juvenile without passing through a free-living larval stage.
direct development
A complex life cycle, found in many algae and all plants, in which there is both a multicellular diploid form, the sporophyte, and a multicellular haploid form, the gametophyte.
alternation of generations
Reproducing only once in a lifetime.
semelparous
Having the capacity to reproduce multiple times in a lifetime.
iteroparous
The selection pressure for high population growth rates faced by organisms that live in environments where population densities are usually low.
r-selection
The selection pressure for slower rates of increase faced by organisms that live in environments where population densities are high.
K-selection
Grime’s triangular model, plants superior in ability to acquire light, minerals, water, and space should have a selective advantage.
competitive plants
