Most primitive member, in which roots are not present, is
Psilotum
Rhynia
Lycopodium
Selaginella
B.
Rhynia
Psilophytes are the oldest of seedless vascular plants. They are characterised by the absence of roots and presence of rhizoids, eg, Rhynia- primitive member of Pteridophytes.
Lycopodium and Selaginella are developed pteridophytes in which plant body is differentiated into roots, stems and leaves.
The process which cannot take place in the absence of viruses is
transformation
conjugation
translocation
transduction
Which part of an animal virus is not reproduced in multiple copies?
Capsid
Protein
Envelope
Ribosome
Contractile vacuole in protozoan Amoeba is meant for
respiration
excretion
locomotion
osmoregulation
Entamoeba histolytica differs from Amoeba in absence of
pseudopodia
contractile vacuole
nucleus
ectoplasm
In Whittaker's system of classification, prokaryotes belong to the kingdom
Monera
Protista
Animalia
Fungi
