Test 1 Flashcards
(26 cards)
Evolution
Species change over time and have a common ancestry.
Fossils
Remains of life-forms of the past
Lamarch
All living things are adapted, and must change over
time to survive.
Inheritance of acquired characteristics “Lamarck’s Will”.
Organs change suddenly, or species could develop new organs if needed.
2. New traits passed on in their new form.
Charles Robert Darwin
Observed and collected data on geological
formations, fossils, geographic distribution of species, adaptations to environments, how
individual populations varied.
Natural Selection
Evolutionary change based on reproductive success.
Charles Robert Darwin Book
The Descent of Man
NS Involves three conditions/principles
Variation - Without it one kind of characteristic could not be favored over another
1. Heritability - Offspring inherit traits.
2. Differential Reproductive Success- Better adapted individuals generally
produce more offspring.
Gregor Mendel
Described basic laws of inheritance.
Gene
Portions of the DNA molecule that code for the production of specific
proteins, carried in pairs.
Vries
Explained the rare variations.
Mutation
Mutation
Any spontaneous change (error) in the genetic code.
Mutations
explain a source of new variation.
b. Mutations are almost always deleterious.
Adapted
Physical traits and behaviors that allow it to survive.
Ecology
Studies the habitats of living things
Niche
Environment of an organism and its adaptive response to that
environment.
Habitat
Place occupied by a species.
Ecosystem
a set of interacting habitats.
Strata
-Layers of rock and soil under the earth’s surface.
Gene Pool
All the genes in a population.
Gene Flow
Process whereby genes pass from one population to another
through mating and reproduction.
Genetric Drift
Distributes genetic variation.
Fission
Splitting up of a population to form new populations.
Founder Effect
Genetic differences between populations produced by the
fact that genetically different individuals established (founded) the populations.
