What are biomes primarily characterized by?

• The number of species they contain

• Their size and area

• Their abiotic and biotic factors

• Their geographical location

Which biome is known for having nutrient-poor soils and high biodiversity?

• Desert

• Temperate Grassland

• Savanna

• Tropical Rainforest

What is a key difference between tropical rainforests and tropical dry forests?

• Tropical rainforests are colder

• Tropical dry forests have less humidity

• Tropical rainforests have alternating wet and dry seasons

• Tropical dry forests have more rainfall

Which biome is characterized by permafrost and no trees?

• Temperate Forest

• Savanna

• Tundra

• Taiga

What primarily defines aquatic ecosystems?

• Salinity, depth, temperature, flow rate, and nutrient concentration

• The presence of coral reefs

• The type of fish present

• The depth of the water

Which zone in marine ecosystems is submerged during high tide and exposed during low tide?

• Aphotic zone

• Photic zone

• Intertidal zone

• Continental shelf

What is a characteristic of the open ocean?

• Constant temperature

• Shallow waters

• High plant life density

• Variety of organisms adapted to high pressure

What is a defining feature of freshwater wetlands?

• They are always dry

• They are found only in tropical regions

• They have high salinity

• They are nutrient-rich and highly productive

What role do estuaries play in aquatic ecosystems?

• They increase the salinity of freshwater

• They serve as spawning grounds for many fish and shellfish

• They are the primary source of ocean currents

• They are the deepest parts of the ocean

Which of the following is true about rivers and streams?

• They are stationary bodies of water

• They have low dissolved oxygen at the source

• They often originate from underground sources

• They flow from low to high elevation