Question

A dicotyledonous plant bears flowers but never produces fruits and seeds. The most probable cause for the given situation is
A)Plant is dioecious and bears only pistillate flowers.
B)The plant is dioecious and bears both pistillate and staminate flowers.
C)Plant is monoecious.
D)Plant is dioecious and bears only staminate flowers.

Answer 1

Hint: It is a plant that produces either male plants or female plants. A plant is both male and female sexes and both plants may have flowers but one with the male flower and other with a female flower.

Complete answer:
There are some flowering plants that have distinct male and female plants they are called dioecious plants. Male and female plants produce flowers but flowers of male plants only contain stamen and not pistils. So they cannot pollinate themselves as other plants do. Hence, never produces seeds and fruits.
-In Dioecious plants female flowers bear the same types of flowers with well-developed pistils. Cannabis is the most common example of a dioecious plant.
-Holly, Asparagus, Dates, Mulberry, Spinach, Ginkgo are some well known dioecious plants.
-Asparagus and Spinach are examples of dioecious food crops.
-Dioecious plant is also known as a unisexual plant.

Additional Information: -When male and female flowers are present on a single plant. It is called a monoecious plant.
-Plants have both stamen and pistillate flowers. It means they have different unisexual flowers but on the same plant.
-They can easily 'self' with each other and pollinate themselves and can bear fruits. It is also called as a bisexual plant.
-Oak, Pine spruce, Corn are some examples of monoecious plants.

So, the correct answer is," plant is dioecious and bears only the staminate flowers".

Note: Insets and dispersal of fleshy fruits by animals help in the pollination of these types of plants.
-The production of seed is limited because of fewer pollen grains or they are unable to self pollinate with each other.
-Many species of dioecious plants have less reproductive capacity because their pollen grain is limited.