Quiz 3

The core trade-off at the heart of iteroparity vs. semelparity is that of reproduction vs. survival growth vs. development reproduction vs. growth survival vs. development

reproduction vs. survival

A reaction norm describes variation in response to the environment of a single genotype competitive relationships between organisms phenotypic variation in a population the amount of heritable variation in a trait

variation in response to the environment of a single genotype

T or F: Iteroparous species can reproduce only once in their life.

False

T or F: Survivorship curves tend to be constant within a species

False

T or F: Biological, physiological and ecological traits all are subject to allometry, or scaling relationships

True

T or F: Low juvenile mortality favors later maturity, and maturity at a larger size

True

True or False: A "Darwinian demon" is an organism that maximises all life history traits at once.

True

True or False: Semelparity is a life history strategy that agriculture commonly selects for, because semelparous crops generally provide higher yields

True

An organ demonstrating positive allometry grows faster than the rest of the body is growing more slowly than the rest of the body is growing at the same rate as the rest of the body is maintaining the same relative size to the body throughout the organism's life

grows faster than the rest of the body

Fly populations that evolved in a very dangerous environment lay more eggs, sooner develop more slowly hit peak fecundity at a later age have a longer lifespan

lay more eggs, sooner

Life history theory seeks to understand how organisms allocate resources towards growth, survival and reproduction to optimize reproductive success size at adulthood speed of development number of offspring

reproductive success

The three basic types of survivorship curves differ based on the distribution and timing of mortality events in a population how many individuals are born each year how many individuals die the average age of mortality

the distribution and timing of mortality events in a population