Unit 10 - Honors

If you remove the producers from the food chain, how does this affect the rest of the consumers? 

• Only the primary consumers will be affected and decrease in population
• Both primary and secondary consumers populations increase
• All population will decrease 
• Only second consumers population is affected, it will increase.

Bacteria are part of the nitrogen cycle, they convert nitrogen into a usable form by what process? 

• Assimilation 
• Nitrogen Fixation 
• Denitrification
• Ammonification

The carbon cycle involves many different processes, conclude which of the following explanations best fits the description for the carbon cycle? 

• Carbon forms are added to the cycle by burning fossils and removed from the process by cellular respiration 
• Carbon forms are added to the cycle by cellular respiration and removed from the process by burning fossil fuels 
• Carbon forms are added to the cycle by cellular respiration and removed from the process by photosynthesis
• Carbon forms are added to the cycle by photosynthesis and removed from the process by cellular respiration

Ecosystems change naturally and human impact is changing ecosystems more rapidly. Why is biodiversity so important for these ecosystems?

• Decreasing biodiversity leads ecosystems to less adaptations and more surviving organisms
• Increasing biodiversity leads ecosystems to more adaptations and less surviving organisms 
• Increasing biodiversity leads ecosystems to more adaptations and more surviving organisms
• Decreasing biodiversity leads ecosystems to more adaptations and less surviving organisms

If you remove a primary consumer from a food web, what happens to the producer population and secondary consumer populations?

• Both populations decrease. 
• Both populations increase. 
• Producer’s population increases, secondary consumer‘s decreases. 
• Producer’s population decreases, secondary consumer’s increases. 
  
  

Differentiate between a carnivore and omnivore. 

• Carnivores only eat plants; omnivore eats both plants and meat
• Carnivores only eat meat; omnivores eat both plants and meat
• Carnivores only eat meat; omnivores eat only plants
• Carnivores and omnivores eat both plants and meat

Using the food web in the image, which organisms are classified as herbivores?

• Grasshopper, frog, bird
• Rabbit, deer, caterpillar
• Deer, grasshopper, fox
• Caterpillar, grasshopper, snake

When humans alter organisms’ habitats by removing trees and adding water, they change the dynamic of the ecosystem. Which of the following is the best possible explanation for why human alteration is dangerous? 

• The ecosystem increases their oxygen content leading to more mammal species (lower diversity)
• The ecosystem decreases their oxygen content leading to less mammal species (lower diversity)
• The ecosystem increases their carbon dioxide content leading to more plant species (higher diversity)
• The ecosystem increases their carbon dioxide content leading to less plant species (low diversity)

When natural disasters move through ecosystems they decrease biodiversity of some organisms and increase it for other organisms. Infer which of the following may be a possible explanation for this?

• Human activities increase populations of popular species and natural disasters need to help keep populations below carrying capacity
• Natural disasters are similar to human impact activities are used to keep populations above carrying capacity 
• Human activities decreases populations of species and natural disasters need to help keep populations near carrying capacity
• Human activities increase populations of popular species and natural disasters need to help keep populations above carrying capacity

Trophic levels are denoted by a pyramid to show that most of the energy comes from the bottom and the least amount of energy is located at the top. Which type of organism is at the bottom and which is at the top?  Primary consumer; Produce

• Primary consumer; tertiary consumer
• Producer; tertiary consumer
•  Producer; primary consumer
• Primary consumer; Producer