CBSE 2025 · Region 2 · Set 2 · Q22 · 3 marks
(a)A bilobed dithecous anther has $\displaystyle 200$ 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.
(a)
A bilobed dithecous anther has $\displaystyle 200$ 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.
Marking-scheme solution
(a)
$\displaystyle 3200$ male gametophyte
(b)
$\displaystyle \star$ Intine made up of cellulose, and pectin.
$\displaystyle \star$ Exine made up of sporopollenin.
Sexual Reproduction in Flowering PlantsPre-fertilisation: Structures and EventsApplyshort_answermedium
Practice Sexual Reproduction in Flowering Plants →All Sexual Reproduction in Flowering Plants questions
More from Sexual Reproduction in Flowering Plants
- Choose the option that gives the correct number of pollen grains that will be formed after 325 microspore…2026 · asked 5×
- Explain the process of the development of a male gametophyte in an angiosperm. Why is it called a male…2023 · asked 3×
- Given below are stages of embryo sac formation from megaspore mother cell. Identify the correct option for…2026 · asked 3×
- Given below is a flower with its characteristic features specialised for the most common type of abiotic…2025 · asked 3×
- (i) Explain the structure of a typical monocotyledonous embryo of a flowering plant. (ii) How are multiple…2025 · asked 3×
- The following question is based on pollination. Study the figures carefully and answer the questions that…2025 · asked 3×
- Select the option that shows the correctly identified 'U', 'X', 'Y' and 'Z' in a developing dicot embryo.2023 · asked 3×
- "Farmers prefer apomictic seeds to hybrid seeds." Justify giving two reasons. OR Mention one advantage and…2024 · asked 3×
CBSE Class 12 Biology past-paper question from the 2025board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.