Sciences - Co-ordinated (Double) - 0654 CIE

Asexual Reproduction

Muhtasari

A strawberry plant can send out a runner that takes root and becomes a whole new plant, identical to its parent. A single bacterium can split into two every twenty minutes. Neither needs a partner, because this is asexual reproduction, making copies from just one parent.

In this lesson you will learn exactly what asexual reproduction is, recognise examples of it, and (for the extended curriculum) weigh up its advantages and disadvantages, both for wild populations and for growing crops. Understanding why identical offspring can be both a strength and a weakness is the heart of this topic.

Malengo

  1. Describe asexual reproduction as a process resulting in the production of genetically identical offspring from one parent
  2. Identify examples of asexual reproduction in diagrams, images and information provided
  3. [Supplement] Discuss the advantages and disadvantages of asexual reproduction: (a) to a population of a species in the wild (b) to crop production

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Maelezo ya Somo

Asexual reproduction lets organisms multiply quickly without a mate, which is useful for farmers wanting uniform crops but risky for a population facing a new disease. Comparing its pros and cons is a classic extended-tier exam question, and it sets up the contrast with sexual reproduction in the next topic.

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Tathmini ya Somo

Hongera kwa kukamilisha somo la Asexual Reproduction. Sasa kwa kuwa umechunguza dhana na mawazo muhimu, ni wakati wa kuweka ujuzi wako kwa mtihani. Sehemu hii inatoa mazoezi mbalimbali maswali yaliyoundwa ili kuimarisha uelewaji wako na kukusaidia kupima ufahamu wako wa nyenzo.

Utakutana na mchanganyiko wa aina mbalimbali za maswali, ikiwemo maswali ya kuchagua jibu sahihi, maswali ya majibu mafupi, na maswali ya insha. Kila swali limebuniwa kwa umakini ili kupima vipengele tofauti vya maarifa yako na ujuzi wa kufikiri kwa makini.

Tumia sehemu hii ya tathmini kama fursa ya kuimarisha uelewa wako wa mada na kubaini maeneo yoyote ambapo unaweza kuhitaji kusoma zaidi. Usikatishwe tamaa na changamoto zozote utakazokutana nazo; badala yake, zitazame kama fursa za kukua na kuboresha.

  1. Asexual reproduction produces offspring that are: A. genetically different from the parent B. genetically identical to the parent C. always larger than the parent D. produced from two parents Answer: B
  2. How many parents are involved in asexual reproduction? A. none B. one C. two D. three Answer: B
  3. Which of these is an example of asexual reproduction? A. fertilisation of an egg by a sperm B. a strawberry plant producing runners C. pollination of a flower D. fusion of two gametes Answer: B
  4. A group of genetically identical individuals from one parent is called a: A. species B. population C. clone D. gamete Answer: C
  5. A disadvantage of asexual reproduction is that the offspring: A. need a mate B. show no variation C. are always weaker D. cannot grow Answer: B

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Vitabu Vinavyopendekezwa

Cambridge IGCSE Biology Coursebook
Cambridge IGCSE Biology Coursebook
Manukuu: Fifth edition
Mchapishaji: Cambridge University Press
Mwaka: 2021
ISBN: 978-1-108-74880-2
Maelezo: Endorsed coursebook with full coverage of the 0610/0970 syllabus, practical investigations and exam-style questions.
Cambridge IGCSE Biology
Cambridge IGCSE Biology
Manukuu: Fourth edition
Mchapishaji: Hodder Education
Mwaka: 2021
ISBN: 978-1-5104-7864-0
Maelezo: Endorsed textbook covering the Core and Supplement content with clear biological diagrams and questions.

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