Which of the following parts of a plant take part in sexual reproduction?

The correct answer is Flower, Seed and Fruit.

Important Points

About Plant Reproduction:

• Sexual Reproduction is defined as the production of a (New organism) from Two-parents by using their (Gametes or Sex cells).
• Plants also have Male and Female sex organs.
• These plants are called (Angiosperms or Flowering plants) as they reproduce by the Sexual reproduction method. 
• Most of the plants contain Reproductive organs of both (Males and Females) in the flowers.
• The (Male organ part) of a flower is called the (Stamen) and the (Female organ part) of a flower is called (Carpel).
• These Pollen Grains help in making (Male Gametes) of the plant and are present in Anther.
• The (Male Gametes) fertilize the (Female Gametes).
• The fertilized (Egg cells) grow in Ovules and become Seeds.
• When germinated, these Seeds started growing as (new Plants).

Image of the Plant Reproduction:

Notes: 

• The discovery of Sex in Plants was noted by two-person {Camerarius and Koelreuter} in 1761.

Mistake Points

• Seeds and fruits are formed from parts of flowers after fertilization process of sexual reproduction in plants.
• Thus, flowers, seeds and fruits all participate in the sexual reproduction process.