Asexual Reproduction

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Biological Sciences

Asexual Reproduction

Year 8

Biological sciences:

Multi-cellular organisms rely on coordinated and interdependent internal systems to respond to changes to their environment (ACSSU175)

Science as Human Endeavour

Scientific models, theories, processes, applications (ACSHE157). Technological advances through science (ACSHE158)

Use of science in improving people’s lives, generating new careers, and meeting societal needs. (ACSHE161)

Use science to evaluate claims or predictions (ACSHE160)

Values of society influence research (ACSHE228)

Scientific Inquiry Processes

Formulate questions or hypotheses to investigate. (ACSIS164)

Plan, select and use appropriate investigation methods e.g. field and laboratory work. (ACSIS165)

Select and use appropriate equipment, to systematically collect and record data (ACSIS166)

Analyse patterns and trends in processing data e.g. relationships between variables (ACSIS169)

Use knowledge of scientific concepts to draw conclusions that are consistent with evidence (ACSIS170)

Evaluate conclusions, including possible alternative explanations. (ACSIS171)

Critically analyse the validity of information in secondary sources and evaluate the approaches used to solve problems (ACSIS172)

Communicate scientific ideas and information, including using appropriate scientific language. (ACSIS174)

Knowledge and Understandings

Sexual/asexual reproduction

All living things try to survive and continue the species by reproducing.

There are two main types of reproduction

– sexual (needs two parents each producing a gamete, which come together in fertilisation) which produces variation and asexual (needs one parent) as they get all their genetic material/information from that one parent, they will be identical to that parent.

This is of tremendous economic importance to society. Vegetative reproduction is used by horticulturalists to produce huge quantities of identical plants.

Asexual Reproduction

Information site about asexual reproduction in plants and animals.

Learning Program

Sexual/asexual reproduction

Purpose:

Students understand the difference between asexual and sexual reproduction. Students can identify different types of asexual reproduction.

Inform:

Introduce the concept of asexual reproduction by discussing the reproduction process of the hydra i.e. budding and how this can be used to produce offspring that are identical to the parent. http://www.youtube.com/watch?v=wfbhwq95Duc http://www.youtube.com/watch?v=a5oHMjGqjyo&feature=related

Research:

Research the way that nurseries use asexual (or vegetative) reproduction to produce large numbers of plants to sell to the public.

Find out if any animals reproduce asexually.

Apply:

Students try to create new plants that are genetically identical to the parent plant by using cuttings.

With pruning shears, take a cutting from a semi-hardwood plant such as e.g. rosemary, lavender, roses, Cut diagonally about six inches of leafy stem from the original plant. The cut should be just below the second to last group of leaves

Mixing a blend of half sand and half peat moss for a solid rooting medium or use rockwool from a plant store.

Dipping the ends of the cuttings in rooting hormone (such as

RHIZOPON) increases the chances of the cuttings taking root

Plant the cuttings into the rooting medium and cover loosely with plastic zipper bags.

Place the covered containers in an area that is shaded and warm.

When you can tug the cutting without it starting to come out of the soil, the roots have developed and it is ready to be potted into potting mix.

© Education Research Solutions T: 1300 669 810 E: [email protected]

W: www.educationresearch.com.au

This is an ERS plan and is NOT endorsed by ACARA. Green font is ACARA sourced materials. Go to: http://www.australiancurriculum.edu.au

*

© Education Services Australia

http://www.howcast.com/videos/206421-How-To-Grow-Plants-From-Cuttings http://www.simplyhydro.com/cuttings.htm

Evaluating:

Produce a poster showing the different types of vegetative reproduction or a flow chart to show the techniques of one type.

R8954 Coral spawning, 1998

Learning Object Education Services Australia The [email protected] Federation

This clip shows coral spawning. As the narrator talks about scientific research into coral spawning, there are close-ups of spawning, footage of a diver swimming among coral, helicopter views of the Great Barrier Reef, and scientists in a laboratory using a scanning electron microscope to look at the development of coral embryos and microscopic views of coral cell division during reproduction. (Classification - Phylum: Cnidaria; Class:

Anthozoa.)

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http://www.scootle.edu.au/ec/objectLink.action?action=content&id=R8954

Assessment:

Create ‘clones’ by making cuttings of plants.

Produce a poster or flowchart explaining one type of vegetative reproduction.

Standards

http://www.australiancurriculum.edu.au/Science/Curriculum/F-10?y=8&s=SU&s=HE&s=IS&layout=1

Teacher Resources IWB T

Reproduction Information site about asexual, sexual and human reproduction.

Sexual vs. Asexual Information about reproduction.

Student Resources IWB S

Mitosis: PowerPoint Presentation about asexual reproduction in plants and animals.

© Education Research Solutions T: 1300 669 810 E: [email protected]

W: www.educationresearch.com.au

This is an ERS plan and is NOT endorsed by ACARA. Green font is ACARA sourced materials. Go to: http://www.australiancurriculum.edu.au

*

© Education Services Australia

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© Education Research Solutions T: 1300 669 810 E: [email protected]

W: www.educationresearch.com.au

This is an ERS plan and is NOT endorsed by ACARA. Green font is ACARA sourced materials. Go to: http://www.australiancurriculum.edu.au

*

© Education Services Australia

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