Question

6.2) define niche.
6.3) name and define the five different types of relationships among living things in ecosystems.
a.
b.
c.
d.
e.
6.4) fill out the missing pieces in this table.

interaction	species a	species b
competition	harmed
predation		harmed
parasitism	benefited
	benefited	benefited
	benefited	unaffected

Explanation:

6.2) A niche is the role and position a species has in its environment, including what it eats, how it obtains food, and its interactions with other species.
6.3)
a. Competition: Interaction where two or more organisms vie for the same limited resources, harming both.
b. Predation: One organism (predator) hunts and eats another (prey).
c. Parasitism: One organism (parasite) benefits at the expense of another (host).
d. Mutualism: Both organisms in the interaction benefit.
e. Commensalism: One organism benefits while the other is neither helped nor harmed.
6.4)

• For competition, Species B is also harmed as they are competing for resources.
• For predation, Species A (predator) is benefited.
• For parasitism, Species B (host) is harmed.
• The interaction where both are benefited is mutualism.
• The interaction where one is benefited and the other is unaffected is commensalism.

Answer:

6.2) The role and position of a species in its environment, including its resource - use and interactions with other species.
6.3)
a. Competition: Organisms vie for limited resources, harming both.
b. Predation: One organism hunts and eats another.
c. Parasitism: One organism benefits at the expense of another.
d. Mutualism: Both organisms benefit.
e. Commensalism: One organism benefits, the other is unaffected.
6.4)

• Competition: Species B: harmed
• Predation: Species A: benefited
• Parasitism: Species B: harmed
• Mutualism
• Commensalism