Transcript Presentation Title

811
Analyze data on levels of variation
within a population to make
predictions about survival under
particular environmental conditions.
:
Analyze data on levels of variation within a
population to make predictions about survival under
particular environmental conditions.
Key concepts/skills:
Level 1: Define key vocabulary.
Level 2: Classify an adaptation as structural, behavioral,
or physiological.
Level 3: Describe the advantages and disadvantages of
individual adaptations. Predict whether an
organisms adaptations will allow it to survive in a
particular environment.
Analyze data on levels of variation within a
population to make predictions about survival under
particular environmental conditions.
• Key vocabulary:
•
Structural adaptations
hibernation/estivation
•
Behavioral adaptations
migration/migratory
•
Physiological adaptations
sexual/asexual
•
populations
predator/prey
•
biological clock
circadian rhythms
innate vs learned
territory/territorial
camouflage
internal/external fertilization
Analyze data on levels of variation within a
population to make predictions about survival under
particular environmental conditions.
I. Adaptation
A.Adaptation – any characteristic that improves an
organism’s ability to survive and reproduce in a specific
environment
1.Structural adaptations – inherited characteristics of
anatomy or physical appearance that improve survival
and reproduction in a specific environment
a.Example; Woodpecker’s beak, chameleon’s tongue,
polar bear’s fur
Analyze data on levels of variation within a
population to make predictions about survival under
particular environmental conditions.
Structural adaptations
b. Internal fertilization – union of egg and sperm internally
c. External fertilization - union of egg and sperm outside
d. asexual reproduction - offspring without egg and sperm
e. sexual reproduction – egg and sperm produce offspring
Analyze data on levels of variation within a
population to make predictions about survival under
particular environmental conditions.
2. Behavioral adaptations – inherited or learned behaviors that
improve survival and reproduction in a specific environment
a. Example; hibernation of mammals, amphibians, and retiles
Analyze data on levels of variation within a
population to make predictions about survival under
particular environmental conditions.
B. Natural selection
1. The process by which organisms which are
best suited to a particular environment
survive and reproduce.
Analyze data on levels of variation within a
population to make predictions about survival under
particular environmental conditions.
II. Variation
A. Variation – differences that exist naturally among members of a species
1. Because members of a population of organisms are different, some
are better adapted to their environment than others. Thus they can
survive and reproduce better than other members of their species.
2. Large variation within a population is good, this allow some
members of the population to survive no matter what changes may
occur in their environment.
Analyze data on levels of variation within a
population to make predictions about survival under
particular environmental conditions.
III. Predictions
A.We want to be able to say which individuals would survive
best in which environments
B.To make these predictions, we must simply decide which
individual has adaptations that best fit the environment that
is presented.
Analyze data on levels of variation within a
population to make predictions about survival under
particular environmental conditions.
IV. Variation of a population
A. Factors that effect population size
1. Food supply
2. Water supply
3. Disease
4. Predation
5. Human activity
6. Extreme weather
7. Geological disasters (earthquake, tsunami, volcano)
Analyze data on levels of variation within a
population to make predictions about survival under
particular environmental conditions.