Factors Affecting Plant Development

Q. Plant growth regulators can be categorized under ______________.

1. intercellular intrinsic factors
2. intracellular intrinsic factors
3. extrinsic factors
4. none of these

Q. The term synergistic action of hormones is ______.

1. When two hormones act together but bring about opposite effects
2. When two hormones act together and contribute to the same function
3. When one hormone affects more than one function
4. When many hormones bring about any one function

Q. Genetic factors are factors whereas environmental factors are factors affecting plant growth and development.

1. plastic
2. intrinsic
3. extrinsic
4. flexible

Q. Development in plants depends on

1. Extrinsic factors only
2. Intrinsic factors only
3. Both extrinsic and intrinsic factors
4. Neither extrinsic nor intrinsic factors