Plants_SPRING___2011[1]

Plants_SPRING___2011[1] - March 29, 2011 Plants One of my...

Info iconThis preview shows pages 1–9. Sign up to view the full content.

View Full Document Right Arrow Icon
March 29, 2011 ―Plants‖
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
One of my favorite Far Side cartoons: (by Gary Larsen)
Background image of page 2
Kingdom – Plantae (Plants) I. General info on plants: -- likely came from green algae living near the edge of water bodies (What kingdom are algae?) -- about 300,000 species known -- provide us with many useful products – food, clothing, shelter, medicines, biotech products, etc. …. -- provide us with oxygen to breathe -- prevent soil erosion on slopes Recent mud slides in California
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
-- were largely responsible for development of societies and civilizations Why/how? Storage of seeds allowed food for long-distance exploration by sea and land (meat would spoil) ( Cereals the first crops domesticated) Domestication of plants (and animals) allowed people to have more to eat and to be more productive in other ways. The ability to grow crops allowed some societies to advance technologically faster than others.
Background image of page 4
Gains in grain: Better rice - through science MSU research could help feed world By Matthew Miller Lansing State Journal EAST LANSING - Tao Sang and his colleagues have spent hundreds of hours shaking rice plants. Shaking them, that is, in the name of science. Sang is professor of plant biology at Michigan State University and the leader of a research team that has identified the genetic mutation that keeps rice grains from falling off their stalks . The results of their five-year research project, which could help to increase rice harvests - and feed more people around the world - made the cover of Friday's issue of Science, arguably the world's leading scientific journal.
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
-- Plants furnish: ~ ** 90% of the world’s calories for humans ~ ** 90% of the world’s protein ~ ** 80% of all world’s food is from plants 11 species 2/3 of these are cereals (8/11) ** Hunting/gathering is the most energy efficient way of life! (A way of life for 99% of all human existence.) What about modern food prod’n? Energy used for: machinery (making, shipping, running, etc.)? fertilizer and chemical production? processing food products? shipping of food products? packaging, etc., etc., etc.?? In modern systems, the 7:1 plant:animal calorie ratio isn’t quite accurate. It’s actually much higher . Why? (Doesn’t reflect all the energy inputs!!!)
Background image of page 6
Efficiency? Calories obtained for each calorie of human energy spent? Hunters/gathers = 9 Modern food production = 210 ... But ~ 0.1 calorie when other energy is considered!! (We are fortunate to have had abundant, ―cheap‖ energy!) How many uses of energy can you find in this picture?
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
-The Indian Pipe lacks chloro- phyll. Doesn’t P’size. Color? -- plants are medicinal (aspirin? echinacea? ephedra?) And now we’re adding genes for medicines ( pharming ). But, let’s look more closely at characteristics of plants:
Background image of page 8
Image of page 9
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 43

Plants_SPRING___2011[1] - March 29, 2011 Plants One of my...

This preview shows document pages 1 - 9. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online