7. what ecological relationship exists between different species of barnacles competing for space on rocks?
a. predation
b. mutualism
c. parasitism
d. interspecific competition
8. which of the following is an example of commensalism?
a. a tapeworm living in a human intestine
b. an orchid growing on a tree branch
c. a lion hunting a gazelle
d. bees pollinating flowers
9. what type of relationship exists between nitrogen-fixing bacteria and legume plants?
a. competition
b. predation
c. parasitism
d. mutualism
10. which describes the relationship between a tick and a deer?
a. parasitism
b. competition
c. mutualism
d. commensalism
11. what ecological relationship best describes the interaction between sharks and remora fish?
a. predation
b. competition
c. parasitism
d. commensalism
12. in which relationship do both species experience negative effects?
a. competition
b. parasitism
c. commensalism
d. mutualism
13. what type of ecological relationship exists between cattle egrets and cattle?
a. competition
b. mutualism
c. parasitism
d. commensalism

Question

Accepted Answer

### Question 7
# Brief Explanations:
Different barnacle species competing for space on rocks is interspecific competition (competition between different species for a resource). Predation is one species eating another, mutualism is both benefiting, parasitism is one benefiting at the other's expense. So the correct option is d.
# Answer:
d. Interspecific competition

### Question 8
# Brief Explanations:
Commensalism is one species benefits, the other is unaffected. An orchid on a tree branch gets support without harming the tree. A tapeworm in human intestine is parasitism, lion hunting gazelle is predation, bees pollinating flowers is mutualism. So the correct option is b.
# Answer:
b. An orchid growing on a tree branch

### Question 9
# Brief Explanations:
Nitrogen - fixing bacteria and legume plants have a mutualistic relationship. Bacteria fix nitrogen for the plant, and the plant provides a home and nutrients for the bacteria. Competition is for resources, predation is one eating another, parasitism is one benefiting at the other's expense. So the correct option is d.
# Answer:
d. Mutualism

### Question 10
# Brief Explanations:
A tick on a deer is parasitism. The tick benefits by getting blood from the deer, and the deer is harmed (e.g., can get diseases or be irritated). Competition is for resources, mutualism is both benefiting, commensalism is one benefits and the other is unaffected. So the correct option is a.
# Answer:
a. Parasitism

### Question 11
# Brief Explanations:
Sharks and remora fish have a commensal relationship. Remora fish attach to sharks to get food scraps and transportation, and sharks are unaffected. Predation is one eating another, competition is for resources, parasitism is one benefiting at the other's expense. So the correct option is d.
# Answer:
d. Commensalism

### Question 12
# Brief Explanations:
In competition, both species are negatively affected as they compete for the same limited resource (e.g., food, space). In parasitism, one benefits and the other is harmed, in commensalism one benefits and the other is unaffected, in mutualism both benefit. So the correct option is a.
# Answer:
a. Competition

### Question 13
# Brief Explanations:
Cattle egrets and cattle have a commensal relationship. Cattle egrets follow cattle to eat insects disturbed by the cattle, and the cattle are unaffected. Competition is for resources, mutualism is both benefiting, parasitism is one benefiting at the other's expense. So the correct option is d.
# Answer:
d. Commensalism

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