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

Author Question: Why are metal ores so valuable? A) They are sources of naturally occurring gold. B) Metals can ... (Read 152 times)

j.rubin

  • Hero Member
  • *****
  • Posts: 557
on: Aug 27, 2018
Why are metal ores so valuable?
 
  A) They are sources of naturally occurring gold.
  B) Metals can be efficiently extracted from them.
  C) They tend to occur in scenic mountainous regions.
  D) They hold many clues to Earth's natural history.

Question 2

Where are antibiotics obtained?
 
  A) molds
  B) fungi
  C) bacteria
  D) all of the above
  E) only A and B


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

abctaiwan

  • Sr. Member
  • ****
  • Posts: 355
Reply #1 on: Aug 27, 2018
Answer to Question 1

B

Answer to Question 2

D


j.rubin

  • Member
  • Posts: 557
Reply 2 on: Aug 27, 2018
Gracias!

31809pancho

  • Member
  • Posts: 317
Reply 3 on: Yesterday
Great answer, keep it coming :)

« previous next »
 

Did you know?

On average, the stomach produces 2 L of hydrochloric acid per day.

Did you know?

The human body produces and destroys 15 million blood cells every second.

Did you know?

The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.

Did you know?

Tobacco depletes the body of vitamins A, C, and E, which can result in any of the following: dry hair, dry skin, dry eyes, poor growth, night blindness, abscesses, insomnia, fatigue, reproductive system problems, sinusitis, pneumonia, frequent respiratory problems, skin disorders, weight loss, rickets, osteomalacia, nervousness, muscle spasms, leg cramps, extremity numbness, bone malformations, decayed teeth, difficulty in walking, irritability, restlessness, profuse sweating, increased uric acid (gout), joint damage, damaged red blood cells, destruction of nerves, infertility, miscarriage, and many types of cancer.

Did you know?

Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.

Properties of some naturally occurring RNA molecules Properties of some naturally occurring RNA molecules
Industrial and transport sources are responsible for a large proportion of global GHG emission Industrial and transport sources are responsible for a large proportion of global GHG emission
Food Sources of Carbohydrates You need to eat at least 130 grams of carbohydrates daily Food Sources of Carbohydrates You need to eat at least 130 grams of carbohydrates daily
An athlete facial expression after winning a gold medal An athlete facial expression after winning a gold medal
Let’s Gold grade 1 reading Let’s Gold grade 1 reading
Video: Introduction to Heart Attacks

For a complete list of videos, visit our video library