Vanda uses the host plant only for the support and does not harm it'. Justify the statement.

Test cross is used to identify whether the plant is homozygous or heterozygous. Justify this statement.

Presence of keystone species and link species of plants are essential for the existence of diversity of organisms .Justify the following statements based on this. a. Fig tree is a keystone species of plant community. b. Mycorrhizal fungi in soil as a link species.

Agrobacterium tumifaciens act as a natural genetic engineer , who trans-forms normal plant cells into tumors. Justify the statement .

b. Philosophically or spiritually, we need to realize that every plant or animal species has an intrinsic value and we have a moral duty to protect them. Justify the statement and write down the protective measures.

The aqueous solution of sugar does not conduct electricity whereas when sodium chloride is added to water, it conducts electricity. Justify this statement.