Gametangia are __________.

• A. multicellular in algae, single-celled in most plants
• B. responsible for the plant's ability to retain moisture in arid environments
• C. the site of development of the fertilized egg in algae
• D. structures specialized for gradual spore discharge
• E. single-celled in algae, multicellular in most plants

Answer: (E)

Verified step by step guidance

1. Understand the term 'gametangia': Gametangia are structures in which gametes (reproductive cells) are formed. They are crucial in the reproductive processes of plants, algae, and fungi.
2. Identify the characteristics of gametangia in algae: In algae, gametangia are typically single-celled structures. This is because algae are generally simpler organisms compared to most plants.
3. Identify the characteristics of gametangia in plants: In most plants, gametangia are multicellular. This complexity allows for more specialized functions and protection of the gametes.
4. Compare the structures in algae and plants: The key difference is that gametangia are single-celled in algae and multicellular in most plants, reflecting the evolutionary complexity of these organisms.
5. Conclude with the correct statement: Based on the characteristics of gametangia in algae and plants, the correct answer is that gametangia are single-celled in algae and multicellular in most plants.