9.1+Plant+structure+and+growth

9 Plant science - 9.1 Plant structure and growth - 9.2 Transport in angiospermophytes - 9.3 Reproduction in angiospermophytes - Plant science labs

What do you remember from previous studies about the cellular structure of leaves? Try to draw and label a leaf TS (transverse section). Mark your effort against the example shown by your teacher.
 * Starter**

Use this [|drag and drop activity from W H Freeman] to test your understanding of leaf structure


 * Assessment statements** (IBO notes added to some point to clearly indicate what needs to be understood and what does not)
 * 9.1.1 || Draw and label plan diagrams to show the distribution of tissues in the stem and leaf of a dicotyledonous plant. Either sunflower, bean or another dicotyledonous plant with similar tissue distribution should be used. Note that plan diagrams show distribution of tissues (for example, xylem, phloem) and do not show individual cells. ||
 * 9.1.2 || Outline three differences between the structures of dicotyledonous and monocotyledonous plants. Examples of differences include parallel (m) versus net-like venation (d) in leaves, distribution of vascular tissue in stems, number of cotyledons, floral organs in multiples of 3 (m) versus 4 or 5 (d), fibrous adventitious roots (m) versus tap root with lateral branches (d). ||
 * 9.1.3 || Explain the relationship between the distribution of tissues in the leaf and the functions of these tissues. This should be restricted to dicotyledonous plants. The functions should include: absorption of light, gas exchange, support, water conservation, and the transport of water and products of photosynthesis. ||
 * 9.1.4 || Identify modifications of roots, stems and leaves for different functions: bulbs, stem tubers, storage roots and tendrils. ||
 * 9.1.5 || State that dicotyledonous plants have apical and lateral meristems. Apical meristems are sometimes referred to as primary meristems, and lateral meristems as cambium. Meristems generate new cells for growth of the plant. ||
 * 9.1.6 || Compare growth due to apical and lateral meristems in dicotyledonous plants. ||
 * 9.1.7 || Explain the role of auxin in phototropism as an example of the control of plant growth. ||

Log in to the [|DCS Bridge]to obtain your workbooks and supporting resources. Word versions of workbooks available below for those unable to access the DCS Bridge.
 * Workbooks and Worksheets **

media type="custom" key="24801624"

An alternative set of notes from [|i-Biology] media type="custom" key="24801626"


 * Presentations and tutorials **

Steven Taylor ( [|i-Biology] ) has a great presentation to view and take notes from before starting your notebook. media type="custom" key="24801628"

This [|tutorial from LeavingBio] goes through plant structure in good detail.

[|Biocoach has a range of interactive tutorials] and quizzes on plant structure. View the ones you need to support your learning (remember not all are needed for this course).

If auxins and tropisms are new to you this [|simple tutorial from KScience] is a good start point, but it does not contain effort information. Make sure you follow it up by using other resources.

W H Freeman [|tutorial on tropisms] gives a thorough understanding of how auxins cause geotropism (aka gravitropism) and phototropism

Use [|click4biology] to review and complete your notes

This is a very visual topic. Put together a wall display to show your knowledge of plant structure and growth. Base the contents of the wall display on your assessment objectives.
 * Activity Suggestions **

Plants use many different strategies to obtain nutrients and their structures are hugely varied. Puya chilensis, a native of Chile, is adapted to trap and eat sheep! What examples can you produce a fact sheet on of usual plant structures and lifestyles? For each show how they are still plants by highlighting the typical plant structures outlined in the assessment statements above.

[|How does auxin promote cellular growth?] Use this animation to find out
 * Use links and articles **