Biodiversity & Organism Interactions

Which of the following is NOT a symbiotic relationship?

• Competition

• Commensalism

• Mutualism

• Parasitism

Fleas living within a mammal's fur describes this type of relationship:

• Competition

• Mutualism

• Predation

• Parasitism

Orchid vines are skinny and grow on the trunk of trees to get more light and space with no negative effect.

• Mutualism

• Commensalism

• Parasitism

• Competition

Parasites and predators help maintain ecosystem stability because...

• They increase the population of all organisms so ecosystems become diverse

• They decrease the population of certain organisms to ensure no species overpopulates

• They increase the survival of all species

• Any of the above are possible

How does competition between organisms maintain ecosystem stability and biodiversity?

• The winners of the competition increase in population size and dominate the ecosystem

• Both organism populations become stronger and larger as a result of the competition

• The population sizes are kept in check due to limited resources

• All of the above are true

Yucca flowers are pollinated by yucca moths. The moths lay their eggs  in the flowers where  the larvae hatch and eat some of the developing seeds. Both species benefit.  

• Mutualism 
• Parasitism 
• Commensalism 

Mistletoe extracts water and nutrients from the spruce tree to the tree's detriment (harm). 

• Mutualsim 
• Parasitism 
• Commensalism 

Maintaining ________ is important to keep an ecosystem healthy.

• pollutants
• biodiversity
• sunlight
• interactions

________ species are important to ecosystems and many ecosystems would collapse without them.

• Keystone
• Extinct
• Wild
• Living

Why do the populations of invasive species grow so quickly? 

• Invasive Species are native to an area. 
• Invasive species are prey to many animals.
• Invasive species have no predators.
• Invasive species keep the ecosystems in equilibrium.