Download App

Animal Kingdom — BIOLOGY STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceBIOLOGYAnimal Kingdom5 Marks
Question
Write four points of differences between the phyla Porifera and Ctenephora. Give an example of each.
✓

Answer

 
Porifera
Ctenophora
1.
Animals show cellular level of organisation.
Animals show tissue level of organisation.
2.
They are asymmetrical.
They are radially symmetrical.
3.
Ciliated comb plates are absent.
Ciliated comb plates are present.
4.
Water canal system is well-developed.
Water canal system is absent.
5.
Water canal system is well-developed.
A skeleton is absent.
6.
Asexual reproduction occurs by fragmentation or gemmules while sexual reproduction takes place by cross-fertilisation e.g., Spongilla.
No asexual reproduction is seen; only sexual reproduction occurs e.g., Pleurobrachia.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "5 Marks Questions" from Animal Kingdom→Animal Kingdom — all question types→BIOLOGY STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

Write differences between Heterochromatin and Euchromatin.
→
Explain the following processes: Depolarisation of the membrane of a nerve fibre.
→
Describe the structure and importance of ligaments in humans.
→
In a plant, tranalocation in xylem is unidirectional while in phloem it is bidirectional. Explain.
→
We find that Rhizobium forms nodules on the roots of leguminous plants. Also Frankia another microbe forms nitrogen fixing nodules on the roots of non-leguminous plant Alnus.
  1. Can we artificially induce the property of nitrogen fixation in a plant – leguminous or non-leguminous?
  2. What kind of relationship is observed between mycorrhiza and pine trees?
  3. Is it necessary for a microbe to be in close association with a plant to provide mineral nutrition? Explain with the help of one example.
→
Differentiate between the anatomy of a dorsiventral leaf and that of an isobilateral leaf.
→
With suitable diagram describe animal cell.
→
What is meant by modification of root? What type of modification of root is found in the:
  1. Banyan tree.
  2. Turnip.
  3. Mangrove trees.
→
Nucleic acids exhibit secondary structure, justify with example.
→
Describe the structure of skeletal muscle.
→