October 19 Flashcards Preview

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Flashcards in October 19 Deck (26):
1

65% of under nourished people reside in _______

Asia

2

In decrees sing hungry people what two areas have made a lot of progress?

Latin America and the Caribbean

3

How many people are clinically obese?

300 million

4

What percentage of food is wasted?

40%

5

50% of food waste occurs in the _____.

Home

6

Population increase is occurring in countries with _______ food

Less

7

How does climate affect food production?

Temperature is a limiting factor

8

Per trophic level what percentage of energy is lost?

90%

9

What has more energy meat or vegetables?

Vegetables

10

True or false
Livestock takes up 1/2 of land mass

False, 1/3

11

What is a locavore?

A person who only eats locally grown foods

12

What are biofuels?

Recently deceased plants and animals

13

What did the green revolution do?

Increased food productivity by using hybridization and auxillary energy forms

14

What is hybridization?

Cross breeding the best characteristics of a crop to have a better yield

15

What is auxillary energy?

Fertilizers and biocides

16

What three crops benefited most from the green revolution?

Corn
Wheat
Rice

17

What effect does the green revolution have on soil?

Depletes the nutrients faster creating nutrient deficient soils that cannot sustain crops

18

The amount of hungry people in the world is _________.

Declining

19

What three things lead to land degradation?

Soil erosion
Water logging
Shorter crop shifts

20

What are some downsides of hybridized crops?

Mass disease will wipe out entire crop
Crop is expensive

21

What are four types of biocides?

Fugicide
Insecticide (DDT)
Fumigonts
Herbicides

22

What are 7 challenges with biocides?

Licensing
Non selective predictor prey control
Biocide resistance
Persistent
Mobile
Biomagnification
Impact humans

23

What is bio magnification of biocides?

The chemical moving up the food chain and increasing its concentration

24

What is bioconcentration?

Bioaccumulation+bio magnification

25

True or false
Biocides kill all pests desired.

False, some will be immune and they are the ones that repopulate creating a mutation that is not affected by the biocides

26

Why is persistence a challenge of biocides?

Long lived animals will be repeatedly exposed to the chemicals