Chapter 25 Flashcards
Planting seeds, cultivating soil, and harvesting crops
Agriculture
Began 11,000 years ago
Agriculture
Agriculture is practiced by independent human groups around the world.
True
Humans realized nutritious, highly productive wild grasses and peas colonized “waste areas”
1.
2.
- Cleared additional land
2. Scattered Seeds
______ ______ became domesticated: growth and reproduction under human control
Wild weeds
Effect of Domestication:
Crop plants cannot survive without ______ _________.
Human Intervention
Humans cannot survive without ______ plants.
Crop
flowering plants
Angiosperms
Most agricultural plants
Angiosperms
Produce energy-storing seeds within fruit.
Angiosperms
Most suitable angiosperms cultivated at start of agricultural period.
True
Angiosperms become more common due to
1.
2.
Natural climate change and increased human activity
angiosperms completing life cycle in a single season; seed to adult plant
Annual plants
annual plants are suitable for agricultural food sources because
1.
2.
3.
- Rapidly produced
- abundant
- easily transported
Annual plants are major ___ ____.
food crops
annual plants evolved from ______ species.
Weedy
Well-suited to growth on open, cleared land
Annual plants
Annual plants surrounded _____ ______.
Human Settlements
Hardiest weeds from two plant families.
Poaceae
Fabaceae
poaceae
Class:
Grasses
Monocots
Fabaceae
Class:
Peas and beans
Dicots
Central grains and forage grasses are a very important food source.
True
70% of land is devoted to _____ production.
Grain
8500 species grown in diverse habitats 1. 2. 3. 4. 5. 6.
Barley Corn Oats, Millet, Rye Rice Sorghum Wheat
Fabaceae or Legume Family is second only to grasses in importance.
True
Peas, beans, soybeans, peanuts,alfalfa, crown vetch & clover
Fabaceae or Legume Family
Source of high quality protein
Fabaceae or Legume Family
Amino acids with nitrogen
Fabaceae or Legume Family
Legumes are _____ ______>
nitrogen fixers
Proteins are made up of ____ _____.
Amino acids
How many amino acids
20
20 amino acids:
9 can be produced by the ______. (_______)
11 we have to ____________. (essential)
body
(nonessential)
eat food that contain them
(essential)
_________ proteins contain all the amino acids needed to build human proteins (meat)
Complete
_________ proteins are missing at least one amino acid needed for humans (plant protein)
Incomplete
Classes of annual plants (not quite)
Monocots and Diocots
