Which one of the following structures between two adjacent cells is an effective transport pathway?

• Plasmodesmata

• Plastoquinones

• Endoplasmic reticulum

• Endoplasmic reticulum

Single -celled eukaryotes are included in 

• Protista

• Fungi 

• Archaea

• Archaea

In unilocular ovary with a single ovule, the placentation is 

• marginal

• basal

• free central 

• free central 

An element playing important role in nitrogen fixation is 

• Molybdenum

• copper

• manganese

• manganese

One example of animals having a single opening to the outside that serves both as mouth as well as anus is 

• Octopus

• Asterias

• Ascidia

• Ascidia

The chief water conducting elements of xylem in gymnosperms are 

• vessels

• fibres

• tansfusion tissue

• tansfusion tissue

which one of the following is not a micronutrient?

• Molybdenum

• Magnesium

• Zinc

• Zinc

Membrane -bound organelles are absent in 

• Saccharomyces

• Streptococcus

• Chlamydomonas

• Chlamydomonas

The kind of epithelium which forms the inner walls of blood vessels is 

• cuboidal epithelium

• columnar epithelium

• ciliated columnar epithelium

• ciliated columnar epithelium

Which one of the following has its own DNA?

• Mitochondria

• Dictyosome

• Lysosome

• Lysosome