Unit 8 Ecology Study Guide

Why don’t plants live in the benthic zone?

• Lack of sunlight for photosynthesis
• High salinity levels
• Lack of oxygen
• Excessive sunlight exposure

What is responsible for seasonal variation of temperature?

• Revolution of the Moon around the Earth
• Distance from the Sun
• The position of the sun to the Earth's equator

• Atmospheric pressure changes

When the pH decreases in the ocean, what happens to the living organisms?

• Living organisms thrive and grow healthier
• Some organisms will die and the number of species is likely to decrease.

• Living organisms become more resistant to changes
• Living organisms experience no impact from the pH decrease

What happens to a population when they lose their habitat?

• Population thrives and expands rapidly
• The population will decrease.

• Population remains unaffected by the loss of habitat
• Population adapts immediately to a new habitat

Explain the process of primary succession after a volcano.

• Volcanoes have no impact on the environment.
• Animals are the first species to colonize barren land after a volcano eruption.
• Pioneer species break down rocks, create soil, and pave the way for grasses, shrubs, and trees to establish.

Why are there less flowers when more trees are in later stages of succession?

• The trees repel herbivores that consume the flowers

• The trees create a microclimate suitable for flower growth

• The dense canopy created by mature trees blocks sunlight from flowers.

• The trees release a chemical that inhibits flower growth

Winter in Florida has less rain and lower temperatures than summer. How does this affect biodiversity?

• Winter will lead to a decrease in biodiversity

• Lower temperatures in winter in Florida have no effect on biodiversity as species can adapt easily.
• Winter in Florida is not significant and has no impact on the ecosystem.

• Winter can lead to an increase in biodiversity

What are 3 examples of abiotic factors?

• Sunlight, temperature, water

• Plants, precipitation, fungi

• Plants, bacteria, and light

• Soil, animals, and fungi

What are 3 examples of biotic factors?

• plants, animals, fungi
• clouds, water, soil

• pH, humidity, bacteria

• bacteria, water, light

When designing an experiment, what group must you have for comparison?

• Sample group
• Experimental group
• Treatment group
• Control group