Among the terms listed below, those that are not technically correct names for a floral whorl are
(i) Androecium
(ii) Carpel
(iii) Corolla
(iv) Sepal.
- (i) and (iv)
- (iii) and (iv)
- (ii) and (iv)
- (i) and (ii)
The Correct Option is C
Solution and Explanation
Top Questions on sexual reproduction in flowering plants
- Unisexuality of flowers prevents which process?
- CBSE CLASS XII - 2025
- Biology
- sexual reproduction in flowering plants
Student to attempt either option (A) or (B).
(A)
(i) Describe the process of megasporogenesis in an angiosperm.
(ii) Draw a diagram of a mature embryo sac of the angiosperm. Label its any four parts.
OR
(B) The reproductive cycle in the female primates is called menstrual cycle. The first menstruation begins at puberty.
Answer the following questions:
(i) Name the four phases of menstrual cycle in a proper sequence.
(ii) How long does the menstrual phase last in a menstrual cycle?
(iii) When and why hormones estrogen and progesterone reach their peak levels respectively, in the menstrual cycle?
(iv) Give the significance of LH surge.- CBSE CLASS XII - 2025
- Biology
- sexual reproduction in flowering plants
Student to attempt either option (A) or (B):
(A)
(i) Write two crucial changes, the seed undergoes while reaching maturity that enable them to be in a viable state until the onset of favourable conditions.
(ii) Name the oldest viable seed excavated from Arctic Tundra as per the records.
OR (B)
(i) Pea flower produced seed sets. Give reason.
(ii) In case of Polyembryony, an embryo ‘P’ develops from a synergid and the embryo ‘Q’ develops from the nucellus. State the ploidy of embryo ‘P’ and ‘Q’.- CBSE CLASS XII - 2025
- Biology
- sexual reproduction in flowering plants
- (a) A bilobed dithecous anther has 200 microspore mother cells per microsporangium. How many male gametophytes can be produced by this anther?
(b) Write the composition of intine and exine layers of a pollen grain.
- CBSE CLASS XII - 2025
- Biology
- sexual reproduction in flowering plants
Given below is a diagram of T.S. of a monocot seed with parts I, II & III labelled :
Choose the option where parts I, II and III are identified correctly.- CBSE CLASS XII - 2025
- Biology
- sexual reproduction in flowering plants
Notes on sexual reproduction in flowering plants
Concepts Used:
Sexual Reproduction in Flowering Plants
Sexual reproduction in flowering plants takes place or happens when the production of a new organism occurs from two parents by making use of their gametes or sex cells. Both sexual and asexual reproduction can be found in plants. Nearly all flowering plants reproduce sexually. Flowers play a captious role in the process as it carries both the male and female reproductive parts commonly known as androecium and gynoecium respectively.
An individual flower comprises the following parts -
- Pedicle
- Calyx
- Petals
- Sepals
- Stamen
- Pistil
- Receptacle