Neet Solved Paper 2015 Question 2
Question: Read the following five statements (I to V) and. select the option with all correct statements.
I. Mosses and lichens are the first organisms to colonize a bare rock.
II. Selaginella is a homosporous pteridophyte.
III. Coralloid roots in Cycas have VAM.
IV. Main plant body in bryophytes is gametophytic, whereas in pteridophytes it is sporophytic.
V. In gymnosperms, male and female gametophytes are present within sporangia located on sporophyte.
Options:
A) I, III and IV
B) II, III and IV
C) I, IV and V
D) II, III and V
Show Answer
Answer:
Correct Answer: C
Solution:
Let’s analyze each statement to determine which ones are correct:
I. Mosses and lichens are the first organisms to colonize a bare rock.
- This statement is correct. Mosses and lichens are pioneer species that can colonize bare rocks and initiate soil formation.
II. Selaginella is a homosporous pteridophyte.
- This statement is incorrect. Selaginella is a heterosporous pteridophyte, meaning it produces two types of spores: microspores and megaspores.
III. Coralloid roots in Cycas have VAM.
- This statement is incorrect. Coralloid roots in Cycas have symbiotic cyanobacteria (blue-green algae) for nitrogen fixation, not vesicular-arbuscular mycorrhizae (VAM).
IV. Main plant body in bryophytes is gametophytic, whereas in pteridophytes it is sporophytic.
- This statement is correct. In bryophytes, the dominant stage is the gametophyte, while in pteridophytes, the dominant stage is the sporophyte.
V. In gymnosperms, male and female gametophytes are present within sporangia located on sporophyte.
- This statement is correct. In gymnosperms, both male and female gametophytes develop within their respective sporangia on the sporophyte.
Based on the analysis, the correct statements are I, IV, and V.
BETA
