28 January Science 7 Dissecting fruits–Considering classification

  1. Mindful moment. Notice the plants around you. When you eat, reflect on how the plants have grown. Consider their flowers and fruits. When you breath, think about how amazing photosynthesis is. Bring up an image of your partner tree into your mind. Find something beautiful in the image.
  2. Review your flower dissections from the last class. How do flowers develop into fruit? What is pollination and how does it take place in different plants? (Have you finished the video Sexual encounters of the Floral Kind?
  3. See todays plan in the class blogpost.
  4. Prepare your DSN for today.
  5. Write any questions you have on a note card.
  • * * * *

Traditionally scientists grouped plants based on the anatomy of flowers and fruits. This system of classification began with a Swedish scientists, Carl Linneaus, http://www.ucmp.berkeley.edu/history/linnaeus.html

With the discovery of DNA and improvements in DNA related technology, scientists are relying more and more on DNA comparisons to put plants into groups.

Here is one of the latest efforts to classify plants: Giant poster: https://drive.google.com/file/d/1jAQRdabRvWQ-xwkaiVcngfHDkA0dfdaB/view?usp=sharing and explanation of poster: Global-Flora-Vol-1

Look at the tomato plant, flower, and fruit.

Use this website to help you carefully dissect and document the anatomy of a tomato http://www-plb.ucdavis.edu/labs/rost/tomato/Reproductive/anat.html

Take pictures, make sketches, write verbal descriptions, make counts and and measures for all the dissections. Be sure your observations are well-labeled and organized.

With each dissection, keep and plant the seeds. Make a “scientific” pic collage or equivalent. (See below for the extra “artistic” pic collage or equivalent.

Dissect and document the anatomy of the peppers (bell and chili). 

 

 

 

 

 

Dissect and document the anatomy of the aubergine (eggplant; brinjal)

See the fruit from the datura species, if available.

Compare your observations of the different fruits. Why do you think scientists would group all the plants (whose fruits you have examined) in the same plant family? Nightshade <https://en.wikipedia.org/wiki/Solanaceae>

<https://www2.palomar.edu/users/warmstrong/ecoph21.htm>

Examine some of the sprouted seeds:

(Bean family <https://en.wikipedia.org/wiki/Fabaceae>; Grass family <https://en.wikipedia.org/wiki/Poaceae>)

Examine some of the other fruits which do not belong to the Nightshade family. Indian Gooseberry (Amla; Phyllanthus emblica); Tamarind (Imli; Tamarindus indica); A small orange citrus–Kumquat? (https://en.m.wikipedia.org/wiki/Kumquat); the syconium of the edible fig (Anjeer; Ficus carica) (What is a syconium < https://en.wikipedia.org/wiki/Syconium >?)

Extra: Create a display of photographs and/or sketches of the fruits and their dissection that you would consider “artistic.”

Take another look at A Confusion of Names from Botany: A Booming History: https://www.youtube.com/watch?v=cVDpdmlpZKw

 

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