Chapter 7 (Part 1) Flashcards
Ecology
is a division of biology that describes how organisms live in their environment
Evolution
the change in the inherited traits in a population of organisms over time
Ecology and evolution are related in that…
evolution is the consequence of ecology over time
Populations of a specific species evolve by…
passing on alleles to the next generation at different rates
Individual organisms do not evolve…
In an individual – heritable traits are already determined through their DNA so they can’t evolve
T/F - individuals can adapt to environmental changes
True
Adaptation involves…
regulating the expression of
certain genes
Evolution is a result of…
reproductive success
Charles Darwin applied the idea…
‘survival of the fittest’ to his theory of evolution by natural selection
selection pressures
Environmental conditions that affect an individual’s ability to survive
Natural selection
the differential survival and reproduction of individuals due to differences in phenotype in a certain
environment.
What does ‘survival of the fittest’ mean?
Individuals born with traits that are beneficial for the current environment tend to survive over others
Genetic variation
exists in individuals in a population
(different alleles)
T/F - DNA changes that occur in
gametes will be passed on to
offspring
True
T/F - Offspring with traits that
are beneficial to present
environment are more
likely to survive
true