Advertisements
Advertisements
प्रश्न
Write down four general characters of Porifera.
Advertisements
उत्तर
(i) These are the simplest multicellular, diploblastic animals.
(ii) They are asymmetrical or radially symmetrical.
(iii) Their cells are loosely held together in a gelatinous matrix, mesoglea and do not form tissues.
(iv) Skeleton is made up of minute calcareous or silicious spicules or spongin fibre (collagen) or both.
APPEARS IN
संबंधित प्रश्न
How do poriferan animals differ from coelenterate animals?
What are the differences between animals belonging to the Aves group and those in the mammalia group?
Prepare a list of some animals that are found parasitic on human beings.
Write down four characteristics of Ctenophora.
Write down four main characters of Platyhelminthes.
What do you mean by the term coelomate animals?
Describe some flight adaptations of the birds.
Write short note on protochordates.
How do animals of Porifera differ from animals of Cnidaria?
Describe general characteristics of phylum Annelida.
What are the group names of the following categories of animals?
Animals with three pairs of legs ___________
Write the name of oviparous mammal.
Give two examples of each of the following: Platyhelminthes
Fill in the blanks:
Nephridia are the excretory organs of ______.
Fill in the blanks:
Bath sponge belongs to phylum ______.
Choose the correct answer: Jelly-fish is classified in the phylum
Choose the correct answer: Which of the following is not a helminth parasite?
Choose the correct answer: Binomial Nomenclature was proposed by
Give scientific reasons.
Body temperature is not constant in amphibians.
Consider the following statements:
- Annelids are true coelomates
- Poriferans are pseudocoelomates
- Aschelminthes are acoelomates
- Platyhelminthes are pseudocoelomates
Choose the correct answer from the options given below:
