Question

Which one of the following plants shows a very close relationship with a species of moth, where none of the two can complete their life cycle without one another?
A.Banana
B.Hydrilla
C.Viola
D.Yucca

Answer 1

We know that a group of species living together forms a population. When the interaction between species of two populations happens, interspecific interactions take place. There are several types of interactions and they can be beneficial, harmful, or even be neutral.

Complete answer:
When the interaction between two species is beneficial to both of them, the relationship between them is called mutualism. There are several examples of this kind of relationship in nature. The relationship between the yucca plant and a type of moth is one among them.
Here, both of the organisms are not able to survive without one another.
Moth needs a yucca plant for food. The larvae of the moth feed on the seeds of this plant and grow to form a moth. It completes most of its life cycle inside the flower of this plant. The Yucca plant provides food to this moth and in turn, it is these moths that pollinate the yucca plant. Only these moths are capable of pollinating the yucca plant so that it cannot survive without these moths.
Both of these species are said to be co-evolves as none of them survives without the help of one another.
Hence the correct option is D.

Note: We know that as both of them are necessary for each other’s survival, it is called obligatory mutualism. This kind of relationship is also seen between a fungus and the roots of higher plants. Their association is called mycorrhizae. They help each other in a way that fungi help in the absorption of nutrients from the soil for the plant and in return, the plant provides food to the fungus.