Problem 7 - Biology Concepts and Applications

Question

Match the terms with the most suitable descriptions. ________predation ________mutualism ________commensalism ________parasitism ________interspecific competition a. one free-living species feeds on another and usually kills it b. two species interact and both benefit by the interaction c. two species interact and one benefits while the other is neither helped nor harmed d. one species feeds on another but usually does not kill it e. two species attempt to utilize the same resource

Step-by-Step Solution

Answer

Predation: a, Mutualism: b, Commensalism: c, Parasitism: d, Interspecific competition: e.

Step 1: Predation

Identify the term that describes a situation where one species feeds on another and usually leads to its death. The description 'one free-living species feeds on another and usually kills it' matches the term 'predation.' Therefore, predation corresponds with description (a).

Step 2: Mutualism

Find the term where both species benefit from their interaction. The description 'two species interact and both benefit by the interaction' fits the term 'mutualism.' Therefore, mutualism corresponds with description (b).

Step 3: Commensalism

Identify the interaction where one species benefits and the other is neither helped nor harmed. The description that matches this is 'two species interact and one benefits while the other is neither helped nor harmed,' which describes 'commensalism.' Commensalism corresponds with description (c).

Step 4: Parasitism

Determine the interaction where one species feeds on another but does not usually kill it outright. 'One species feeds on another but usually does not kill it' best describes 'parasitism.' Therefore, parasitism corresponds with description (d).

Step 5: Interspecific Competition

Find the term that involves two species attempting to use the same resource. The description 'two species attempt to utilize the same resource' refers to 'interspecific competition.' Therefore, interspecific competition corresponds with description (e).

Key Concepts

Predation

Predation is a biological interaction where one species, the predator, hunts and eats another species, the prey. This interaction often results in the prey's death, making it a crucial natural process for maintaining ecological balance. Predation plays a significant role in shaping both population dynamics and community structure.
Predators can be carnivores, herbivores, or omnivores depending on what they consume.
Understanding predation helps us grasp important concepts about food webs and energy flow in ecosystems.

Mutualism

Mutualism describes an interaction where both participating species derive benefits, often enhancing their survival or reproduction.
This relationship can be obligatory, where species are dependent on each other, or facultative, where they aren't strictly necessary but still beneficial.

• Pollination by bees, where bees get nectar and plants get pollinated, is a classic mutualistic example.
• Another example is the relationship between clownfish and sea anemones, where clownfish get protection, and anemone gets food scraps and cleaning.

Studying mutualism reveals how interconnected and cooperative nature can be.

Commensalism

Commensalism occurs when one species benefits from an interaction, while the other remains unaffected. This kind of relationship is often subtle, leading to less obvious ecological impacts than mutualism or predation.

• An example is barnacles attaching to whales; barnacles get mobility to access more food, while whales are neither helped nor harmed.
• Another instance is birds nesting in trees; birds gain a place to live, while the tree remains unaffected.

Commensalism teaches us about how species can coexist without intense competition or cooperation.

Parasitism

Parasitism involves one organism, the parasite, living on or inside another organism, the host, from which it derives nutrients. Unlike predation, parasitism doesn't usually kill the host immediately, allowing longer-term exploitation.
Parasites can be found across various domains of life, including animals, plants, and fungi.

• Ticks feeding on mammals and tapeworms inside digestive tracts are common examples.
• Parasitic plants like mistletoe, which extract water and nutrients from host trees, also illustrate parasitic interactions.

Understanding parasitism helps in managing diseases and ecological health.

Interspecific Competition

Interspecific competition occurs when two or more species compete for the same limited resources, such as food, water, or territory. This interaction affects the population size, distribution, and evolutionary pathways of the competing species.
Resources in nature are rarely abundant enough for everyone, so species often evolve different strategies to outcompete others.

• For example, different bird species might compete for the same seeds, leading to variations in beak shapes to access different food sources.
• Lions and hyenas often compete for similar prey in shared habitats.

By studying interspecific competition, we learn about survival strategies and mechanisms that species develop.