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प्रश्न
Which among the following has specialised tissue for conduction of water?
- Thallophyta
- Bryophyta
- Pteridophyta
- Gymnosperms
विकल्प
(i) and (ii)
(ii) and (iii)
(iii) and (iv)
(i) and (iv)
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उत्तर
(iii) and (iv)
Explanation -
InKingdomPlantae,vasculartissues i.e., specialised tissues for the conduction of water and minerals (xylem) and for the translocation of food (phloem) are present in the groups Pteridophyta, Gymnospermae, and Angiospermae. The groups Thallophyta and Bryophyta do not possess vascular tissues for the conduction of water, minerals, and food.
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संबंधित प्रश्न
An example for colonial form of algae is
Agar-Agar is obtained from _____ algae.
In polypetalae, the petals are free.
Match the following.
| Cyanophyceae | Green algae |
| Chlorophyceae | Blue-green algae |
| Phaeophyceae | Red algae |
| Rhodophyceae | Brown algae |
Assertion (A): Blue green algae are prokaryotes.
Reason (R): They do not have a true nucleus.
______ is a blue-green algae.
Polvsiohonia is a ______ alga.
Agar-Agar is extracted from red algae.
Mention two forms of algae with examples.
In the members of Phaeophyceaе.
- Asexual reproduction occurs usually by biflagellate zoospores.
- Sexual reproduction is by oogamous method only.
- Stored food is in the form of carbohydrates which is either mannitol or laminarin.
- The major pigments found are chlorophyll a, c and carotenoids and xanthophyll.
- Vegetative cells have a cellulosic wall, usually covered on the outside by gelatinous coating of algin.
Choose the correct answer from the options given below:
