High School

11. Archegoniates are typically:
- (A) Flowering plants
- (B) Shrubs
- (C) Trees
- (D) Non-flowering plants

12. Which is the male reproductive structure in flowering plants?
- (A) Pistil
- (B) Stamen
- (C) Ovary
- (D) Style

13. Which of the following is not a type of fossil?
- (A) Cast fossils
- (B) Trace fossils
- (C) Mineral fossils
- (D) Mold fossils

14. Which plant has a hollow stem with ridges?
- (A) Lycopodium
- (B) Equisetum
- (C) Azolla
- (D) Selaginella

15. Archegoniates show the phenomenon of:
- (A) Heterospory
- (B) Homospory
- (C) Seed formation
- (D) Double fertilization

Answer :

Let's go through each of the questions to understand them better:

  1. Archegoniates are typically:
    Archegoniates refer to plants that produce archegonia, which are female reproductive structures. These are generally non-flowering plants such as mosses, ferns, and liverworts. Therefore, the correct option is (D) Non-flowering plants.

  2. Which is the male reproductive structure in flowering plants?
    In flowering plants, the male reproductive structure is known as the stamen. It is made up of the anther, which produces pollen, and a filament that supports the anther. Hence, the correct choice is (B) Stamen.

  3. Which of the following is not a type of fossil?
    Fossils are usually classified into types based on how they were formed. The common types include cast fossils, trace fossils, and mold fossils. 'Mineral fossils' is not a recognized type. Hence, (C) Mineral fossils is not a type of fossil.

  4. Which plant has a hollow stem with ridges?
    Equisetum, also known as horsetail, is known for its distinct hollow, jointed stems with ridges. This makes (B) Equisetum the correct answer.

  5. Archegoniates show the phenomenon of:
    Archegoniates, like ferns and mosses, can exhibit both homospory and heterospory, but they are mostly associated with the production of different types of spores, which is heterospory. Answer (A) Heterospory is thus associated with archegoniates.