write any two important characteristic features of pteridophyta and Echinodermata
Answers
Answer:
Characteristic Features of Phylum Echinodermata
These are exclusively marine animals.
The larval forms show bilateral symmetry and adult forms show radial symmetry.
They are triploblastic.
It exhibits organ system grade of organisation.
They have a true coelom.
The body is uniquely shaped.
Answer:
Pteridophytes are considered as the first plants to be evolved on land: ...
They are cryptogams, seedless and vascular: ...
They are cryptogams, seedless and vascular: ...
Spores develop in sporangia: ...
Sporangia are produced in groups on sporophylls: ...
Sex organs are multicellular: ...
They show true
Characteristics of Echinodermata
They have a star-like appearance and are spherical or elongated.
They are exclusively marine animals.
The organisms are spiny-skinned.
They exhibit organ level of organization.
They are triploblastic and have a coelomic cavity.
The skeleton is made up of calcium carbonate.