leaf cutting, stem Investigate various techniques of plant propagation (e.., cut
ID: 140309 • Letter: L
Question
leaf cutting, stem Investigate various techniques of plant propagation (e.., cutting, root cutting, seed germination) and compare these with traditional Aboriginal practices. Create a table comparing one traditional Aboriginal practice with a technique commonly used today. (10 marks) 2. State the most common function of each of the following seed structures: (4 marks) a. seed coat b. endosperm c. cotyledon d. embryo What is the main way in which the production of pollen and seeds contributes to the survival of plants? (2 marks) 3. 4. List the parts of an angiosperm seed and their main functions. (3 marks)
Explanation / Answer
1. plant prapogation is the process of reproducing/creating a new plant or seedligs. it is one of the most efficient method to maintain plant species. The most common method of asexual propogation is cutting. cmany types of plants are commonly propogated by cuttings. A cutting is a vegetative part of plant. (like root stem, leaf). which has been cutted from parent plant in order to regenerate itself.cutting can be further categorized into: leaf cutting, stem cutting and root cutting.
stem cutting is most common method used for vegative propogation. it can be easily used for both herbaceous and woody plants. stem cuttings are further categorized as softwood, semi hardwood and hardwood stem cutting
leaf cutting is other method which helps in growth of new plant. this method is exclusiely used for indoor plants. there are different ways of rooting leaf cuttings; whole keaf with petiole, whole leaf withoout petiole and leaf sections.
root cutting can be taken from 2-3 year oldd plants during their dormant seasonwhen they have large carbohydrate supply.
seed germination is other method which helps in roduction of large no. of plants.
Advantages of plant prapogation:
1. large quantities of identical plants can be produced in short space of time
2. the method is beneficial for reproducing plants that are difficult to reproduce conventionally and naturally
3. plants are disease resistant
4. prapogated plants grow more faster.
Q 2.
Sead coat : they protects the seeds and help in seed dispersion.
Endosperm:it covers the embryo and provide nutrition in the form of starch.
cotyledon: They are small embroyonic leafs. they contain food reserves which can be used in early stages of germination
Embryo: Small Plant after fertilization. it can grow into adult plant.
Question 3. pollens and seeds are reproductive adaptation of plants. its evident that most of the plants reproduce with seeds. plantb make seeds as a mean to reproduce themselves under favourable climatic conditions.
pollen is multicellular structure that carries sperm cells and protects it from drying out. pollens can be carried out from one plant to another by wind, water insect, birds. the pollens then attaches to part of plant that contains egg and release the sperm for further fertilizatin and growth.
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