Sustainable Grazing, Trophic Cascades, & Keystone Species

What is a unique property of camel milk compared to cow's milk?

• It contains more fat.

• It is non-allergenic and has 10 times the antibacterial and antiviral properties.

• It is easier to store for long periods.

• It contains more sugar.

What is the process called when fertile land becomes barren and unproductive due to overgrazing and soil erosion?

• Desertification

• Deforestation

• Erosion

• Overgrazing

What is one of the main differences between temperate pastures and arid rangelands?

• Temperate pastures have shallow soil, while arid rangelands have deep, nutrient-rich soil.

• Arid rangelands support only limited water-efficient plants and shrubs, while temperate pastures have deep, nutrient-rich soil.

• Arid rangelands have plentiful moisture, while temperate pastures are dry.

• Both temperate pastures and arid rangelands have the same soil and plant types.

What do living organisms depend on for survival in their environment?

• Only sunlight

• Only water

• One another and their environment

• Only decomposers

What is a niche in an ecosystem?

• a pond or lake that is covered in algae

• a system of interconnected parts that are living and non-living.

• the function (job) of an organism within its ecosystem or habitat

• Another word for plants.

Why did the rancher in the California plan switch to camels in the arid land?

• The land had abundant water.

• Camels are better suited for arid lands with little water.

• Camels are easier to manage than other livestock.

• Camels are the only animals available in arid lands.

Why might goats be a good choice for livestock in Northern California?

• They require only 5 liters of water per day.

• They require 1 acre of land per goat.

• They consume more resources than other animals.

• They are difficult to manage.

How would Yellowstone change if the wolves were removed again?

• Everything would stay the same as the wolves had no effect.

• Elk would return to the areas they now avoid and overgraze on the vegetation, changing the landscape, creating a trophic cascade. .

• The weather would change back to normal and it would be very cold.

• More bears would populate the park

BIOTIC: Which of the following is NOT a biotic factor in the environment

• Predators
• Temperature
• Parasites
• Producers

HIERARCHY: Which of the following is in correct order from simplest to most complex?

• organism, population, community, ecosystem, biosphere

• biosphere, populations, ecosystem, community, organism

• organism, ecosystem, population, community, biosphere

• biosphere, ecosystem, community, population, organism