Fusion of two gametes which are dissimilar in size is termed as
1. | Oogamy | 2. | Isogamy |
3. | Anisogamy | 4. | Zoogamy |
A prothallus is
1. | A structure in pteridophytes formed before the thallus develops |
2. | A sporophytic free living structure formed in pteridophytes |
3. | A gametophyte free living structure formed in pteridophytes |
4. | A primitive structure formed after fertilization in pteriodophytes |
Plants of this group are diploid and well adapted to extreme conditions. They grow bearing sporophylls in compact structures called cones. The group in reference is
1. | Monocots | 2. | Dicots |
3. | Pteridophytes | 4. | Gymnosperms |
The giant Redwood tree (Sequoia sempervirens) is a/an
1. | Angiosperm | 2. | Free fern |
3. | Pteridophyte | 4. | Gymnosperm |
What is not true for mosses?
1. | Sporophyte is less elaborate than liverworts |
2. | Protonema stage develops directly from a spore |
3. | Leafy stage develops from a secondary protonema as a lateral bud |
4. | They are attached to soil through multicellular and branched rhizoids |
Antheridium of bryophytes produce _______ antherozoids.
1. | Non-motile | 2. | Uni-flagellate |
3. | Biflagellate | 4. | Ciliate |
Which of the following classes of algae store food that is chemically very similar to amylopectin and glycogen?
1. | Chlorophyceae | 2. | Phaeophyceae |
3. | Rhodophyceae | 4. | All algae |
Evolutionarily, the first terrestrial plants to possess vascular tissues are:
1. | Bryophytes | 2. | Pteridophytes |
3. | Gnetales | 4. | Cycads |
All the following are characteristics of bryophytes except:
1. spore producing
2. dominant gametophyte
3. lignified tissues
4. producing antheridium and archegonium
Oogamous sexual reproduction is seen in:
1. | Ulothrix | 2. | Spirogyra |
3. | Udorina | 4. | Fucus |