Life Science Grade 11

Grade 11 Life Sciences Lesson Plans• Draw a table on the chalkboard where learner responses onadvantages and disadvantages of asexual and sexual reproductionwill be listed.• It should include the following:ADVANTAGES OF ASEXUAL REPRODUCTION• Only one plant needed to produce many plants.• Offspring are genetically alike; therefore if parent plant has suitable oradvantageous genes the new plants will be identical.• The formation of new plants by asexual means is faster than theformation of new plants by sexual reproduction.• No need for pollinating agents or seed dispersal.DISADVANTAGES OF ASEXUAL REPRODUCTION• Weak parent will produce weak offspring because offspring aregenetically identical to parent plant.• New plants may not survive environmental changes.ADVANTAGES OF SEXUAL REPRODUCTION• Offspring show genetic variation.• May allow for the formation of new species under changingenvironmental conditions.• Diseases and parasites carried by the parent may not be passed on tothe offspringDISADVANTAGES OF SEXUAL REPRODUCTION• It is a slow process as suitable gametes are required.• Mutations occur which can produce a lethal or disadvantageousgene.• Involves pollination and seed dispersal which requires agents such aswind, water or birds and insects.• Learners must respond by providinganswers for advantages of sexual andasexual reproduction.• Learners should copy the table into theirbook and record the relevant points asthey are discussed in their workbooks15 minConclusion:• Revise all the points written on chalkboard with learners to reinforceconcepts of sexual and asexual reproduction.• Activities may be assigned as homework10 min• Solutions for all LifeSciences Gr. 11Classroom activity 3pp.70; OxfordSuccessful LifeSciences Gr. 11Activity pp.43Term 1 Page 43© Gauteng Department of Education (CAPS version)