Biology Module 3: Biological Diversity
IQ1: Effects of the Environment on Organisms
Selection Pressures #
Drives Natural Selection
Biotic
Abiotic
Non-Living
Living
Ecosystems
Competition
Predation
Disease causing agents - pathogens
Trees - Habitat
Soil pH
Temperature
Shelter
Light
Rainfall
Climate
Combination of all the biotic factors living in a community interacting with abiotic factors
types
Grasslands
Woodlands
Desert
Aquatic
Rainforest
Freshwater
Saltwater
Example
Cane Toad
Introduced Species
Acts on
Red-bellied Black Snakes
Size of head
Northern Quoll
Prolific breeders
Used as a biological control for cane beetles
Biological ___
No natural Predators
Faster & larger
Invasion Front
Food Aversion Gene
Abundance
Distribution
IQ2: Adaptions
Structural
Behavioral
Physiological
Internal Processes
How they Function
Physical Characteristics
How they Act
Charles Darwin
Galapagos Islands
Finches
Beak Size & Shape
Australia
Platapus
Water Vole - England
Natural Selection
VASRP
Different Finches on Different Islands
Speciation
Arboreal or land
IQ3: Theory of Evolution by Natural Selection #
Accumulation of Microevolution
Macroevolution
e.g. Horse
Shorter Periods
Millions of Years
Results in new Species
No Speciation
New Variaitons
Number of Digits
Teeth Size & Shape
Size of Organism Increased
Environment
Over 50 millions Years
Type of Evidence
Transitional Fossils
Types of Evolution
Divergent
Convergent
Same Environment (selection pressures)
Recent Common Ancestor
Adaptive Radiation
Homologous Structures
E.g. Dolphins & Sharks
E.g.
Punctuated Equilibrium vs, Gradualism
IQ4: Evidence of Evolution
Homogolous