Question:
Given below are two statements:
Statement (I): In dioecy conditions, Staminate and pistillate flowers occur in the same plant, either in the same inflorescence or in separate inflorescence.
Statement (II): In monoecy conditions, Staminate and pistillate flowers occur on the separate plants.
In light of the above statements, choose the most appropriate answer from the options given below.
Given below are two statements:
Statement (I): In dioecy conditions, Staminate and pistillate flowers occur in the same plant, either in the same inflorescence or in separate inflorescence.
Statement (II): In monoecy conditions, Staminate and pistillate flowers occur on the separate plants.
In light of the above statements, choose the most appropriate answer from the options given below.
Statement (I): In dioecy conditions, Staminate and pistillate flowers occur in the same plant, either in the same inflorescence or in separate inflorescence.
Statement (II): In monoecy conditions, Staminate and pistillate flowers occur on the separate plants.
In light of the above statements, choose the most appropriate answer from the options given below.
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To remember this clearly:
Monoecious = One house (Mono-ecy) $\rightarrow$ Both male and female flowers share the same plant.
Dioecious = Two houses (Di-oecy) $\rightarrow$ Male and female flowers live on separate plants.
Monoecious = One house (Mono-ecy) $\rightarrow$ Both male and female flowers share the same plant.
Dioecious = Two houses (Di-oecy) $\rightarrow$ Male and female flowers live on separate plants.
Updated On: Jul 31, 2026
- Both Statement (I) and Statement (II) are correct.
- Both Statement (I) and Statement (II) are incorrect.
- Statement (I) is correct but Statement (II) is incorrect.
- Statement (I) is incorrect but Statement (II) is correct.
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The Correct Option is B
Solution and Explanation
Step 1: Understanding the Concept:
Sex expression in flowering plants is a highly conserved genetic trait that governs pollination biology and mating systems.
Plants can produce hermaphrodite (perfect) flowers or unisexual (staminate/male or pistillate/female) flowers.
The spatial distribution of unisexual flowers defines whether a species is monoecious or dioecious.
These configurations are natural mechanisms designed to encourage cross-pollination and limit self-fertilization.
Step 2: Detailed Explanation:
Statement (I) is incorrect:
Dioecy (or the dioecious condition) is characterized by unisexual flowers occurring on entirely separate male and female plants.
A single dioecious plant is either exclusively male (producing staminate flowers) or exclusively female (producing pistillate flowers).
Examples include papaya, date palm, spinach, and Cannabis.
The statement incorrectly claims that staminate and pistillate flowers occur on the same plant in dioecy.
Statement (II) is incorrect:
Monoecy (or the monoecious condition) is characterized by separate staminate (male) and pistillate (female) flowers developing on the same individual plant.
These flowers can be located within the same inflorescence or in separate inflorescences on the same stem.
Examples include maize, coconut, chestnut, and many cucurbits.
The statement incorrectly claims that staminate and pistillate flowers occur on separate plants in monoecy.
Because both statements define the conditions incorrectly, swaping the definitions of monoecy and dioecy, both statements are incorrect.
Step 3: Final Answer:
Therefore, the most appropriate choice is that both Statement (I) and Statement (II) are incorrect.
Sex expression in flowering plants is a highly conserved genetic trait that governs pollination biology and mating systems.
Plants can produce hermaphrodite (perfect) flowers or unisexual (staminate/male or pistillate/female) flowers.
The spatial distribution of unisexual flowers defines whether a species is monoecious or dioecious.
These configurations are natural mechanisms designed to encourage cross-pollination and limit self-fertilization.
Step 2: Detailed Explanation:
Statement (I) is incorrect:
Dioecy (or the dioecious condition) is characterized by unisexual flowers occurring on entirely separate male and female plants.
A single dioecious plant is either exclusively male (producing staminate flowers) or exclusively female (producing pistillate flowers).
Examples include papaya, date palm, spinach, and Cannabis.
The statement incorrectly claims that staminate and pistillate flowers occur on the same plant in dioecy.
Statement (II) is incorrect:
Monoecy (or the monoecious condition) is characterized by separate staminate (male) and pistillate (female) flowers developing on the same individual plant.
These flowers can be located within the same inflorescence or in separate inflorescences on the same stem.
Examples include maize, coconut, chestnut, and many cucurbits.
The statement incorrectly claims that staminate and pistillate flowers occur on separate plants in monoecy.
Because both statements define the conditions incorrectly, swaping the definitions of monoecy and dioecy, both statements are incorrect.
Step 3: Final Answer:
Therefore, the most appropriate choice is that both Statement (I) and Statement (II) are incorrect.
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