Question

VAM is characterised by
A. Intracellular vesicles
B. Intracellular arbuscules
C. Both A and B
D. Associative symbiosis

Answer 1

Hint: VAM (Vesicular arbuscular mycorrhizal) is a fungus. It is a type of mycorrhiza of phylum Glomeromycota. It is a type of symbiotic fungi that infect plant roots. It colonizes on the root cortex forming a mycelial network.

Complete answer:
VAM (Vesicular arbuscular mycorrhizal) is a fungus. It is a type of mycorrhiza of phylum Glomeromycota. These are also called endomycorrhiza. It is a type of symbiotic fungi that infect plant roots. It colonizes on the root cortex forming a mycelial network. It is characterised by vesicles i.e bladder like structures and arbuscules i.e branched finger-like hyphae. These help the plant to uptake more nitrate and phosphate. So the correct answer is C i.e both A and B. VAM dissolves the phosphates present in the soil. It provides the plants strength to resist diseases and unfavourable natural hazards and weather. It is not easy to identify the fungi on the roots. It colonizes on the angiosperm species. It is also found on the roots of some aquatic plants.

Note:
It is a type of symbiotic fungi that infect plant roots. It colonizes on the root cortex forming a mycelial network. It provides the plants strength to resist diseases and unfavourable natural hazards and weather. It colonizes on the angiosperm species. It is also found on the roots of some aquatic plants.