Population Demographics
Population growth is influenced by the __ rate which is the difference between the __ rate and __ rate.
Fertility
Birth
Death
When societies have evolved, human diets change in what way?
Fat, sugar, meat (Increases/decreases)
Whole grains and fibers (Increases/decreases)
Increases
Decreases
Why is there concern about grain crops not being able to partake in agricultural intensification?
They require strong light energy for grain production
What is domestication syndrome?
Collection of phenotypic traits that most domesticated crops share.
Chlorophyll (absorbs/reflects) red and blue light.
Absorbs
What continent is responsible for constant increasing population?
Africa
What are the five nutrient classes in order from largest to smallest?
Carbohydrates, Fats (lipids), proteins, vitamins, and minerals.
What are some implications of agricultural intensification?
Multi-cropping
How long ago were the first plants domesticated?
10,000 years
What is the difference between monocots and dicots? What do they have in common?
They are both flowering plants but differ in their appearance as grass-like or broad-leafed. Monocots have one cotyledon while dicots have two
Stable populations have (high/low) birth and death rates.
High
As meat demand increases, what other type of crop demand increases?
Grains
How can crop yields be increased?
Chemical applications
Soil improvement
More knowledge about when and how to plant
Improving plant genetics
Labor became more specialized, societies became hierarchical, population growth, and developed cities are all a cause of ...
Agriculture
What is the role of stomata?
Intakes Co2 and releases O2 and water
What socio-economic factors influence growth rate?
Infrastructure, food supply, poverty, medical availability, and education
Amino acids are made from ...
Proteins
Increasing crop yield by different yield increasing methods and resulting in multiple cropping to be possible.
What are some common domestication syndrome traits?
Size
Adaptation to photoperiod
Seed shattering
Seed dormancy
Growth habit and harvest index
Changes in toxicity/taste
What 4 things do plant cells have that animal cells don't?
Chloroplasts
Cell Wall
Large Vacuoles
Plasmodesmata
Rapid population growth happens when there are (more/less) young people than older people.
More
The recomended daily nutrient intake is (Higher/lower) than the needed intake.
Higher
What are some methods for agricultural intensification?
Greenhouse (Light and temperature control)
Hydroponics
What is food fortification?
Increasing the vitamin/mineral content of a crop in some way (adding medium to soil ex.)
For photosynthesis to occur, the plant needs what 3 components?
Sunlight, water, and CO2