CBSE Questions for Class 12 Medical Biology Reproduction In Organisms Quiz 5 - MCQExams.com

• The flowers perform the function of sexual reproduction in plants. Flowers are known as the reproductive parts of a plant.
• While the other parts such as stem, leaf, and root have no role in sexual reproduction and are known as vegetative parts of a plant.
• Hence, Option B is correct.
  

• Parthenogenesis refers to the development of an organism without fertilisation.
• In honeybee, males develop from unfertilized eggs while females are the result of fertilisation.

• Autogamy is the fusion of 2 different types of gametes that are from the same individual. Though, genetically they are similar as they're from the same individual.
• Isogamy is the fusion of gametes that are similar.
  
• Allogamy is the fusion of two different types of gametes between two different individuals. This term is commonly used for plants. These gametes are dissimilar genetically too.
• Dichogamy is the production of male and female reproductive elements at different times by a bisexual organism in order to ensure cross-fertilization.
  

$$\textbf{Correct option: A}$$

$$\textbf{Solution:}$$

Option A:

$$\bullet$$ Parthenogenesis is the development of animal embryo from egg without fertilization.

$$\bullet$$ It is a natural type of asexual reproduction in which egg is formed but does not get fertilized by the sperm. An unfertilized egg directly develops into embryo. 

Option B:

$$\bullet$$ Parthenocarpy is the formation and development of fruit prior to fertilization of an unfertilized ovary.

$$\bullet$$ This process naturally forms seedless fruits. Banana is a parthenocarpic fruit.

Option C:

$$\bullet$$ Apospory is the development of diploid female gametophyte from vegetative cells of sporophyte without meiosis and spore formation.

Option D:

$$\bullet$$ Apomixis is the type of asexual reproduction in which both formation and fusion of gametes does not occur but there is formation of seed.

Hence the correct option is option A.

Correct Option: A

Explanation:

• Parthenogenesis is the development of an egg or ovum into a spring without fertilization.

Hence, parthenogenesis is formation of egg without fertilization.