Interactions between Organisms

Multiple Choice

What is the correct classification of this symbiotic relationship?

• predator/prey

• commensalism

• mutualism

• parasitism

Multiple Choice

Cattle egrets forage (feed) in fields among cattle. The egret gets easy access to flying insects stirred up by the cattle, and the cattle don't care if they are there or not.

• mutualism
• commensalism
• competition
• parasitism

Multiple Choice

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• Predation, because the ants feed on the fungi

• Mutualism, because both the ants and the fungi benefit from each other

• Competition, because both organisms consume the same resource for energy

• Commensalism, because the ants receive energy from the fungi and the fungi are unaffected

Multiple Choice

The acacia ant nests and feeds in the plant’s hollow thorns. The ant helps protect the bullshorn acacia by attacking insects and grazing animals that come near the plant. The relationship between the acacia ant and the bullshorn acacia is an example of which of the following?

• Commensalism

• Mutualism

• Neutralism

• Parasitism

Multiple Choice

Which of these best demonstrates mutualism between certain types of bacteria and humans?

• Intestinal bacteria obtain nutrients from the gut and produce vitamin K used by humans.

• Bacteria become resistant to antibacterial medication that humans use for treatment.

• Invasive bacteria at an area of injury produce toxins that damage healthy tissues of the human body.

• Bacteria in improperly prepared food is consumed by humans, causing food poisoning

Multiple Choice

a relationship that occurs when two or more organims of the same species need the same resource at the same time

• competition
• symbiosis
• predation

Multiple Choice

What type of role do bacteria have in an ecosystem?

• harmful role

• beneficial role

• both harmful and beneficial role

• neither