APES Chapter 3: Evolution,
Biodiversity, And Population
Ecology With Complete Solutions
Artificial Selection - Answers Natural selection conducted under
human direction
Age Structure Diagram (population pyramid) - Answers A diagram
demographers use to show the age structure of a population. The width of
each horizontal bar represents the relative number of individuals in each
age class
Age Distribution - Answers The relative numbers of organisms of
each age within a population. Age distributions can have a strong effect on
rates of population growth or decline and are often expressed as a ratio of
age classes, consisting of organisms (1) not yet mature enough to
reproduce, (2) capable of reproduction, and (3) beyond their reproductive
years
Adaptive Trait (adaptation) - Answers A trait that confers greater
likelihood that an individual will reproduce
, Q&A
Biosphere - Answers The sum total of all the planets living
organisms and the abiotic portions of the environment with which they
interact
Biological Diversity - Answers The variety of life across all levels of
biological organization, including the diversity of species, their genes, their
populations, and their communities
Carrying Capacity - Answers The maximum population size that a
given environment can sustain
Community Ecology - Answers The study of the interactions among
species, from one-to-one interactions to complex interrelationships
involving entire communities
Density-Independent Factor - Answers A limiting factor whose
effects on a population are constant regardless of population density
Density-Dependent Factor - Answers A limiting factor whose effects
on a population increase or decrease depending on the population density
Demographer - Answers A scientist who studies human populations
Darwin, Charles - Answers (1809-1882) English naturalist who
proposed the concept of natural selection as a mechanism for evolution
and as a way to explain the great variety of living things
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