Question

which of these is an example of a relationship that is not symbiosis? a tick drinking blood from a dog. a bird building a nest in a tree. two lions fighting over a dead zebra. a bee getting nectar from a flower.

Explanation:

Symbiosis is a long-term, close biological interaction between two different species. Let's analyze each option:

1. A tick drinking blood from a dog: This is parasitism, a type of symbiosis where one species benefits at the expense of the other.
2. A bird building a nest in a tree: This is commensalism, a symbiotic relationship where one species benefits and the other is unaffected.
3. Two lions fighting over a dead zebra: This is intraspecific competition, an interaction between members of the same species, not a symbiotic relationship (which requires two different species).
4. A bee getting nectar from a flower: This is mutualism, a symbiotic relationship where both species benefit.

Answer:

Two lions fighting over a dead zebra.