Plant Kingdom Question 545
Question: Assertion : Homosporous pteridophytes are exosporic. Reason : Heterosporous pteridophytes are endosporic.
Options:
A) If both the assertion and the reason are true and the reason is a correct explanation of the assertion
B) If both the assertion and reason are true but the reason is not a correct explanation of the assertion
C) If the assertion is true but the reason is false
D) If both the assertion and reason are false
Show Answer
Answer:
Correct Answer: B
Solution:
In the homosporous pteridophytes the gametophyte is exosporic, i.e., it is not enclosed by the spore wall.
Exosporic gametophytes are potentially monoecious, i.e., they produce or have the capacity to produce both types of sex organs.
In the heterosporous pteridophytes the gametophytes are strictly dioecious and the micro and megagametophytes are endosporic by the wall of the microspore or megaspore, respectively.
BETA
