Class 12 Biology Important Chapter 2 Sexual Reproduction in Flowering Plants

Class 12 Biology Important Chapter 2 Sexual Reproduction in Flowering Plants Solutions English Medium As Per The New Syllabus to each chapter is provided in the list so that you can easily browse through different chapters ASSEB Class 12 Biology Important Solutions in English and select need one. AHSEC Class 12 Biology Additional Notes Download PDF. HS 2nd Year Biology Additional Solutions.

Class 12 Biology Important Chapter 2 Sexual Reproduction in Flowering Plants

Also, you can read the NCERT book online in these sections Solutions by Expert Teachers as per Central Board of Secondary Education (CBSE) Book guidelines. ASSEB Class 12 Biology Additional Question Answer are part of All Subject Solutions. Here we have given HS 2nd Year Biology Important Solutions English Medium for All Chapters, You can practice these here.

Sexual Reproduction in Flowering Plants

Chapter: 2

IMPORTANT QUESTION AND ANSWER

Answer the Following Question:

1. Name the nutritive tissue formed after triple fusion.

Ans: Endosperm.

2. What structure develops into the seed coat?

Ans: Integuments of the ovule.

3. Name one plant that forms seed without fertilisation.

Ans: Banana.

4. What is the function of coleoptile in monocots?

Ans: It protects the shoot apex and leaf primordia in monocot embryos.

5. What is the structure that attaches the ovule to the placenta?

Ans: Funicle.

6. What is the product of triple fusion?

Ans: Primary endosperm nucleus.

7. What is apomixis?

Ans: Seed formation without fertilisation.

8.  What is the ploidy of the primary endosperm cell?

Ans: Triploid (3n).

9. What is perisperm?

Ans: Persistent nucellus in some seeds.

10. What type of ovule is common in angiosperms?

Ans: Anatropous.

11. Which part of the fruit is derived from the ovary wall?

Ans: Pericarp.

12. Why is sporopollenin considered the most resistant organic substance?

Ans: Sporopollenin forms the outer wall (exine) of pollen grains. It is resistant to high temperatures, strong acids and alkalis, and enzymes that degrade organic matter. This makes pollen grains durable and well-preserved as fossils.

13. What is triple fusion?

Ans: Secondary nucleus contains two nuclei one from syner gids and the other from antipodal cells. Thus it is already diploid (2n). So when the second male gamete fuses with it during fertilization it become triploid nucleus (3n). This is called triple fusion.

14. What do you mean by Parthenogenesis and Parthenoсагру?

Ans: When fruits develop without fertilization it is called parthenogenesis. It leads to production of seedless fruit. Production of seedless fruits is called parthenocarpy.

15. What is the function of filiform apparatus in synergids?

Ans: The filiform apparatus helps in guiding the pollen tube into the synergid during fertilisation.