Exam (elaborations)
PLS 103: Exam 1 with 100% correct answers rated
- Course
- Institution
PLS 103: Exam 1 with 100% correct answers rated
[Show more]
Content preview
PLS 103: Exam 1Crops can be used directly to feed us (people), or to feed farm animals (cows, hogs etc.), or for purposes
not related to food (such as making biofuels to power our cars and trucks). Is CORN used for all these
purposes? - correct answer ✔✔Yes, for all three of them
Agriculture is important to a nation's economy as well as to its requirement for food - True or False? -
correct answer ✔✔True
Is agriculture in the U.S. our nation's largest use of land, soil and water? - correct answer ✔✔Yes
How long ago is agriculture thought to have begun? - correct answer ✔✔10,000 years ago
Agriculture is practiced on which one of these environmental systems? - correct answer
✔✔Agroecosystem
Crops can be used directly to feed us (people), or to feed farm animals (cows, hogs etc.), or for purposes
not related to food (such as making biofuels to power our cars and trucks). Is ALFALFA used for all these
purposes? - correct answer ✔✔No, not for all three of them
Agriculture is very productive in the U.S. because we have which one of these conditions? - correct
answer ✔✔Both good soils and favorable climates for growing crops
Our existence on Earth depends on plants. - True or False? - correct answer ✔✔True
What percentage of the U.S. population is directly working in agriculture today? - correct answer ✔✔2%
Both better food availability, and better medical care, have contributed to overall world population
growth. - correct answer ✔✔True
, Hunger in developing countries is typically caused or worsened by which one of these factors or groups
of factors? - correct answer ✔✔Global economic crisis, poverty, and war
Cereal crop yields (harvested tons/acre) have increased, or decreased, in most countries since the
1960s? - correct answer ✔✔Increased
In which one of these areas is the population increasing much faster than in the U.S? - correct answer
✔✔Africa
Food production per capita (i.e. per person) in the world, since the 1960s, has increased slightly overall. -
correct answer ✔✔True
What is the world's human population expected to be by the year 2050? - correct answer ✔✔9 billion
Today there is no longer any food insecurity in the world. - correct answer ✔✔False
Over the long-term (past 50 years) and in general, how have food prices in the world changed? - correct
answer ✔✔Decreased
In which one of these regions would you expect to find the economically poorest people? - correct
answer ✔✔Sub-Saharan Africa
Proteins are made up of which of the following smaller types of molecules? - correct answer ✔✔Amino
Acids
Which one of these minerals, or combinations of minerals, must we have in our diet? - correct answer
✔✔Calcium, potassium, copper
How many kinds of vitamins that we obtain from our food are considered to be essential? - correct
answer ✔✔13
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller BravelRadon. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $12.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
78252 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now