This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: The most productive systems on land are A) natural prairies. B) grasslands. C) forests. D) ... (Read 62 times)

jace

  • Hero Member
  • *****
  • Posts: 541
on: Jul 16, 2018
The most productive systems on land are
 
  A) natural prairies.
  B) grasslands.
  C) forests.
  D) tundra.

Question 2

In 1948 in Donora, Pennsylvania, the routine release of toxins into the air became a deadly fog because of
 
  A) a chemical spill in the nearby Monongahela River.
  B) greatly increased activity of the nearby industries.
  C) a thermal inversion and stagnant weather conditions.
  D) the failure of the chemical scrubbing systems on smokestacks.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

macagn

  • Sr. Member
  • ****
  • Posts: 345
Reply #1 on: Jul 16, 2018
Answer to Question 1

C

Answer to Question 2

C


jace

  • Member
  • Posts: 541
Reply 2 on: Jul 16, 2018
Excellent

bigcheese9

  • Member
  • Posts: 333
Reply 3 on: Yesterday
Great answer, keep it coming :)

« previous next »
 

Did you know?

Serum cholesterol testing in adults is recommended every 1 to 5 years. People with diabetes and a family history of high cholesterol should be tested even more frequently.

Did you know?

Historic treatments for rheumatoid arthritis have included gold salts, acupuncture, a diet consisting of apples or rhubarb, nutmeg, nettles, bee venom, bracelets made of copper, prayer, rest, tooth extractions, fasting, honey, vitamins, insulin, snow collected on Christmas, magnets, and electric convulsion therapy.

Did you know?

Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.

Did you know?

Approximately one in four people diagnosed with diabetes will develop foot problems. Of these, about one-third will require lower extremity amputation.

Did you know?

Giardia is one of the most common intestinal parasites worldwide, and infects up to 20% of the world population, mostly in poorer countries with inadequate sanitation. Infections are most common in children, though chronic Giardia is more common in adults.

Tri parti-colored (white, brown and black) guinea pig in its natural habitat. Tri parti-colored (white, brown and black) guinea pig in its natural habitat.
Dentition, as illustrated in Knight's Sketches in Natural History Dentition, as illustrated in Knight's Sketches in Natural History
Geothermal energy and powers Earth’s systems Geothermal energy and powers Earth’s systems
Object Oriented Systems Analysis and Design Object Oriented Systems Analysis and Design
Autonomic Nervous Systems Autonomic Nervous Systems
Plot of land (Part c) Plot of land (Part c)
Video: Effect of the environment on coat color in the Himalayan rabbit Animation

For a complete list of videos, visit our video library