Vegetative Propagation

Question 1

Vegetative propagation

Answer 1

Is asexual reproduction in plants, reproduction without seeds

Question 2

Growth regulators

Answer 2

Chemicals in plants that control their growth

Question 3

Sterile

Answer 3

Free from all microorganisms

Question 4

Species

Answer 4

A group of organisms that have the ability to produce fertile offspring

Question 5

Tissue culturing

Answer 5

Growth of cells outside a living organisms on a sterile nutrient medium

Question 6

List the advantages of asexual over sexual reproduction in plants

Answer 6

Asexual
Simpler/ faster process
Doesn’t depend on outside agents
One parents involved, divide by mitosis

sexual
Complex/ slower process
Depends on outside agents
Two parents involved, divide by meiosis

Question 7

List the advantages of sexual reproduction over asexual reproduction

Answer 7

Asexual reproduction
All identical to parent cell
More competition and overcrowding
More susceptible to the same disease

sexual reproduction
Unidentical to each other - variation
Less competition and overcrowding
More resistant to disease

Question 8

Name and describe methods of natural vegetative propagation AND LIST EXAMPLES

Answer 8

Stem- Runner form horizontal stems, buds form at nodes and new plants form
Eh. Strawberry
Root-Root tuberswollen underground root, new plants grow
Eg.sweet potato
Leaf-Plantletsform on edge of leaf
Eg. Begonia
Bud- Bulb modified leaf swollen with food die stimulates many new buds to develop, main bud develops leaves
Eg onion

Question 9

Name and describe methods of artificial vegetative propagation

Answer 9

1. Cuttings
   - stem cutting dipped in rooting power and allowed to form new roots and shoots

2.Grafting
- combining favourable qualities from different plants
( the shoot (scion) of one plant attached to the root system ( stock) of another plant

3.Layering
- a branch of parent stem bent over and covered with soil. The covered parts (if they have a node) forms roots and the tip forms a shoot

4. Micropropagatin
   -Many plants grow from small plant pieces, growth takes place on a sterile nutrient medium( this is an example of tissue culturing)

Question 10

Advantages to artificial negative propagation

Answer 10

Fast
Cheap
large quantities
Desirable traits