What are sucking roots? Explain with the help of example.

We find that Rhizobium forms nodules on the roots of leguminous plants. Also, Frania another microbe forms nitrogen fixing nodules on the roots of non-leguminous plant Alnus. Is it necessary for a microbe to be in close association with a plant to provide mineral nutrition? Explain with the help of one example.

What is a dihybrid cross? Explain with the help of a suitable example and checker board method.

What is an Ambident Nucleophile?Explain with the help of an example.

Explain Pleiotropy with the help of a suitable example.

State the physical quantities that decide the trajectory of motion. Explain with help of two examples.

Explain pressure-volume expansion work with the help of an example.

Explain co-ordinatin is plants with the help of suitable examples.

Explain briefly the animal body plan with the help of suitable example.

What are viroids? Explain using example.