Which of the following structures helps in the respiration of lichens?

• Soredia

• lsidia

• Cyphella

• Cephalodia

Dikaryon formation is characteristic of :

• ascomycetes and basidiomycetes

• phycotnycetes and basidiomycetes

• ascomycetes and phycomycetes

• phycomycetes and zygomycetes

In Entamoeba histolytica, the presence of chromatid bodies is characteristic of

• precystic stage

• mature quadrinucleate stage

• trophozoite stage

• mature binucleate stage

Which of the following taxonomist described classification of plant kingdom in "Families of flowering plants" ?

• Cronquist

• Takhtajan

• Benson

• Hutchinson

The protists have

• only free nucleic acid aggregates

• membrane bound nucleoproteins lying embedded in the cytoplasm

• nucleoprotein in direct contact with the rest of the cell substance

• none of these

In the sporogonium of which plant, columella is present ?

• Penicillium

• Spirogyra

• Rhizopus

• Ulothrix

Trochophore is the larva of :

• Neopilina

• Chiton

• Pila

• all of these

Which of the following fungi is found useful in the biological control of plant disease ?

• Penicillium notatum

• Phytophthora parasitica

• Mucor mucido

• Trichoderma viridae

Medicine for curing respiratory problems is obtained from

• Ephedra

• Calotropis

• Eucalyptus

• Cannabis

The slime moulds are characterized by the presence of :

• elaters

• pseudoelaters

• capillitium

• capitulum