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104 Cards in this Set

  • Front
  • Back

Ecosystem Diversity

The variety of ecosystems within a given region

Species Diversity

Variety of species within a given ecosystem; measured by species richness and evenness

Species

A group of organisms that is distinct from other groups in its morphology (body form and structure), behavior, or biochemical properties

Genetic Diversity

Variety of genes within a given species

Population

Group of interacting individuals of the same species occupying an area

Species Richness

Measure of species diversity, the number of species in a given area

Species Evenness

Measure of species diversity, the relative proportion of different species within a given area

Phylogeny

Branching patterns of evolutionary relationships

Evolution

Change in the genetic composition of a population over successive generations

Artifical Selection

Humans can breed plants and animals to get desired traits

Natural Selection

Some diversity of life has evolved because the most fit organism in an environment survives and is able to pass on these fitness traits

Microevolution

Small genetic changes that a population undergoes

Macroevolution

Long-term, large-scale, evolutionary changes among groups of species

Deductive Reasoning

Broad to specific

Inductive Reasoning

Specific to broad

Fitness

An individual's ability to survive and reproduce

Adaptation

Inherited trait that increases a population's chances of survival or reproduction

Mutation

A random change in the genetic code produced by a mistake in the copying process

Genetic Drift

A change in the genetic composition of a population over time as a result of random mating

Bottleneck Effect

A reduction in the genetic diversity of a population caused by a reduction in its size

Founder Effect

A change in a population descended from a small number of colonizing individuals

Speciation

Idea that when a species is isolated from other populations, two distinct species may be able to form

Reproductive Isolation

Two populations within a species forming their own exclusive groups. They will eventually no longer be able to interbreed and produce viable offspring

Geographical Isolation

Physical seperation of a group of individuals from others of the same species

Allopatric Speciation

The idea of speciation that occurs with geographic isolation

Sympatric Speciation

The idea of speciation without geographic isolation

Genetic Engineering

When scientists copy genes from a species with desirable traits

Genetically Modified Organisms

Organisms produced by copying genes from a species with a desirable trait and inserting them into another species

Range of Tolerance

The limits to abiotic conditions that a species can tolerate

Limiting Factor

Any abiotic factor that limits or prevents the growth of a population

Tolerance Curve

Illustrates range of survival for a species

Generalist Species

Tolerate a wide range of conditions

Specialist Species

Can only tolerate a narrow range of conditions

Habitat

The place where an organism lives

Ecological Niche

The role an organism fulfills in an ecosystem; its way of life

Law of Competitive Exclusion

Two species cannot occupy the exact same niche for long

Fundamental Niche

The full range of resources or habitat an organism could use in the absence of competition

Realized Niche

The range of resources or habitat an organism does occupy due to the constraints of competition

Endemic Species

Found in only one area

Exotic Species

A species introduced into a new geographic area

Weather

The state of the atmosphere at a particular place for a short period of time

Climate

Weather conditions over a long period of time

Factors that affect climate

•temperature


•precipitation


•altitude

Troposphere

Is where weather occurs

Stratosphere

Second layer of atmosphere

Air Pressure

The force exerted downward on a surface by the weight of air above that surface

Thermal Stratification

Vertical temperature layers

Albedo

The percentage of incoming solar energy that is reflected from a surface

Solar Energy

The Earth receives energy from the Sun in the form of infrared waves, visible light waves, and UV waves

Convection

Warm air/water rises, cold air/water sinks

Atmospheric Convection Currents

Uneven heating of Earth's surface causes warmer air to rise and cooler air to sink. Air closer to the surface warms and rises, then cools and sinks. Primary cause of wind

Intertropical Convergence Zone

Area of the Earth with the most intense sunlight

Hadley Cells

Convection currents that cycle between the equator at 30N and 30S. Cause "trade winds"

Ferrell Cells

Convection currents that rise at 60N and 60S and sink at 30N and 30S

Polar Cells

Convection currents that rise at 60N and 60S and sink at the poles

Coriolis Effect

Deflection of an object's path due to the rotation of the Earth

Jet Stream

Fast flowing narrow current of air flowing 150 to 300 mph high in troposphere. Usually blows from West to East

Gyres

Large scale patterns of water circulation. Move clockwise in the Northern Hemisphere and the opposite in the Southern Hemisphere

Upwelling

Upward movement of water towards the surface

Thermohaline Circulation

An oceanic circulation pattern that drives the mixing of surface water and deep water

Weather Fronts

A boundary between two air masses of different density and temperature. Warm air is less dense and cold air is more dense

Warm Fronts

Occur when a warm air mass advances on a cooler air mass

Cold Fronts

Occur when a cold dense mass of air advances on a warmer mass

Tropical Cyclones

Are generated when a low pressure system develops over warm ocean water

Hurricanes

In Eastern Pacific

Typhoons

In Western Pacific

Tornadoes

Occur when a strong, dry cold front collides with warm, humid air

Monsoons

Seasonal winds and heavy rains

El Niño Southern Oscillation

El Niño and La Niña combined. Causes major changes in "normal" weather patterns

El Niño

Warmer than normal surface waters of tropical Eastern Pacific

La Niña

Cooler than normal water in tropical Pacific

Rain Shadow

Desert-like conditions on the east side of mountains

Biome

Regions characterized by a particular climate, soil, and vegetation

Marine

Saltwater

Estuary

Wetlands, salt marshes, mangrove swamps

Freshwater

Streams/rivers, lakes/ponds, wetlands

Plankton

Group of weakly swimming, free-floating organisms

Phytoplankton

Unicelluar producers

Zooplankton

"Animals." Range from unicellular to large

Nekton

Can swim and are consumers

Benthos

Live on the bottom of the aquatic biome

Euphotic Zone

Upper layer in deep water habitats. AKA "photic zone"

Aphotic Zone

Lower layers in deep water habitats

Coastal Zone

Warm, nutrient-rich, shallow water that extends from the high-tide mark on land to the gently sloping

Continental Shelf

Shallow part of the ocean right off the coast of the continents

Pelagic Zone

Meaning "open sea," water in a sea or lake that is neither close to the bottom nor near the shore. Water column that goes from the surface of the sea almost to the bottom

Benthic Zone

On the bottom

Open Sea

Part of an ocean that is beyond the continental shelf

Water Column

A conceptual column of water from the surface to the bottom sediments

Intertidal Zone

Area of shoreline between high and low tides

Coral Reefs

"Rainforest of the ocean"

Bleached Coral Reef

Warming and/or polluted water killing algae/coral

Estuaries (Coastal Wetlands)

Where fresh and salt water meet

Wetlands

Area of land whose soil is saturated with moisture either seasonally or permanently

Mangrove Swamps

Coastal areas mostly compromised of mangrove shrubs and trees

Barrier Islands

Low, narrow, sandy islands that form offshore from a coastline

Swamps

Wetlands with trees

Marshes

No trees, wet only part of year

Bogs

Acidic rain-fed wetland; sphagnum moss (peat moss) and cranberries

Littoral Zone

Shallow area of soil and water near the shore where plants can grow

Limnetic Zone

Open water zone with algae but no plants

Profundal Zone

Region of water below the limnetic zone. No photosynthesis

Oligotrophic Lakes

Deep, nutrient-poor lakes with rocky bottoms

Eutrophic Lakes

Shallower and have increased nutrients