- Exam
- NEET
- Year
- 2015
- Subject
- Botany
- Chapter
- Plant Kingdom
NEET 2015 · Botany · Plant Kingdom
Read the following five statements (A to E) and select the option...
(a) Mosses and lichens are the first organisms to colonize bare rock.
(b) Selaginella is a homosporous pteridophyte.
(c) Coralloid roots in Cycas have VAM.
(d) Main plant body in bryophytes is gametophytic, whereas in pteridophytes it is sporophytic.
(e) In gymnosperms, male and female gametophytes are present within sporangia located on sporophytes.
Options
- A(a), (c) and (d)
- B(b), (c) and (d)
- C(a), (d) and (e)
- D(b), (c) and (e)
Correct answer
C. (a), (d) and (e)
Step-by-step solution
Mosses are found in moist, shady places, moist rocks, and damp walls or on tree trunks as well as lichens grow on rock surfaces & named by Theophrastus are the first organisms to colonize bare rock.
Selaginella is a heterosporous pteridophye, meaning both male and female spores are produced by the plant.
Coralloid roots of Cycas have nitrogen-fixing cyanobacteria. Mycorrhiza (VAM) is seen in the roots of Pinus.
Main plant body in bryophytes is gametophyte because gametophyte is dominant over sporophyte as gametophyte is branched, haploid, long-lived and independent whereas sporophyte is diploid short-lived and dependent upon gametophyte. Main plant body in pteridophyte is sporophyte.
Unlike bryophytes and pteridophytes, the male and the female gametophytes of gymnosperms do not have an independent free-living existence. They remain within the sporangia retained on the sporophytes.