Question

Read the following five statements (1 - 5) and answer as asked next to them.

(1) In Equisteum the female gametophyte is retained on the parent sporophyte.

(2) In Ginkgo male gametophyte is not independent.

(3) The sporophyte in Riccia is more developed than that in Polytrichum.

(4) Sexual reproduction in Volvox is isogamous.

(5) The spores of slime moulds lack cell walls.

How many of the above statements are correct?

• A. Two
• B. Three
• C. Four
• D. One

Answer 1

The correct option is (D):

Explanation of the correct option:

Statement (1)

1. ​Equisteum does not form seeds.
   
2. They belong to pteridophytes in which the female gametophyte has independent existence.
3. This is why the female gametophyte does not stay retained on parent sporophyte.
   

Statement (2):

1. ​Ginkgo belongs to the category of Gymnosperms.
   
2. In gymnosperms, the male and female gametophytes do not have independent existence.
3. This is why male gametophyte is not independent.

Statement (3):

1. ​The sporophyte in Polytrichum is more developed than sporophyte of Riccia.
   
2. It has well developed foot, seta and capsule.
3. Hence, the given statement is false.

Statement (4):

1. Volvox reproduces with the help of oogamy.
   
2. The two gametes produced from Volvox have different sizes and one of the them is motile while the other is non-motile.
   
3. Isogamous condition means equal size of gametes.
4. Hence, the given statement is false.

Statement (5):

1. Slime moulds lack cell wall, but their spores have a very thick cell wall made up of cellulose.
2. Therefore, the given statement is false. ​
   

Final Answer: One of the above statements is correct.