All the following differentiate gymnosperms from the higher cryptogams except:
1. | Presence of an independent green gametophyte |
2. | development of an ovule |
3. | Formation of the pollen tube |
4. | Presence of cambium |
The features seen in the gymnosperm Cycas include:
I. | Coralloid roots |
II. | Unbranched stems |
III. | Pinnate persistent leaves for a few years |
IV. | Male cones and megasporophyllys borne on same plant |
1. I and II only
2. I and IV only
3. I, II and III only
4. I, II, III and IV
Which one is a wrong statement?
1. | Archegonia are found in Bryophyta, Pteridophyta and Gymnosperms. |
2. | Mucor has biflagellate zoospores. |
3. | Haploid endosperm is typical feature of gymnosperm. |
4. | Brown algae have chlorophyll-a and c, and fucoxanthin. |
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 colonise 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. |
1. I, III and IV
2. II, III and IV
3. I, IV and V
4. II, III and V
Read the following statements (IV) and answer the question which follows them
I. | In liverworts, mosses and ferns gametophytes are free living. |
II. | Gymnosperms and some ferns are heterospores. |
III. | Sexual reproduction in Fucus, Volvox and Albugo is oogamous. |
IV. | The sporophyte in liverworts is more elaborate than that in mosses. |
How many of the above statements are correct?
1. One
2. Two
3. Three
4. Four