CH Plant Propagation

Question 1

Which type of cutting is taken from the actively growing, soft tip of a stem and roots most quickly but wilts most easily?

Accepted Answer

Softwood cutting

Answer

Hardwood cutting

Answer

Semi-hardwood cutting

Answer

Leaf-bud cutting

Question 2

Stratification of seeds is a pre-germination treatment that involves:

Accepted Answer

Exposing seeds to a period of cold and moist conditions to break dormancy

Answer

Soaking seeds in a gibberellin solution

Answer

Scarifying the seed coat with acid

Answer

Drying seeds at high temperature

Question 3

Scarification of seeds is performed to:

Accepted Answer

Break or weaken the hard seed coat to allow water imbibition

Answer

Provide cold treatment for dormancy breaking

Answer

Apply fungicide treatments

Answer

Improve seed storage life

Question 4

Grafting is a vegetative propagation technique primarily used to:

Accepted Answer

Combine desirable scion traits with rootstock vigor, disease resistance, or adaptability

Answer

Produce plants from seed quickly

Answer

Induce polyploidy in ornamentals

Answer

Eliminate the need for pruning

Question 5

Auxin (IBA or NAA) is applied to stem cuttings to:

Accepted Answer

Promote adventitious root formation

Answer

Prevent fungal infection

Answer

Speed shoot growth after rooting

Answer

Harden off the cutting before transplanting

Question 6

Tissue culture (micropropagation) is preferred for propagating some plant species because it:

Accepted Answer

Produces large numbers of genetically uniform, disease-free plants rapidly

Answer

Requires no sterile conditions

Answer

Only works with seed propagation

Answer

Is less expensive than cuttings