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

Author Question: As far as we know all forms of life on Earth use ____________ as a medium for chemical reactions. ... (Read 70 times)

plus1

  • Hero Member
  • *****
  • Posts: 676
on: Jul 27, 2018
As far as we know all forms of life on Earth use ____________ as a medium for chemical reactions.
 
  a. gaseous helium
  b. gaseous helium
  c. frozen carbon dioxide
  d. liquid water
  e. frozen water

Question 2

The habitable zone around a star is
 
  a. the region on a planet where conditions are acceptable for life to exist.
  b. a region around a star where a planet's temperature would permit the existence of liquid water.
  c. very small for a massive star.
  d. only found around G and K stars.
  e. a region on a young planet where amino acids can begin to form DNA molecules.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

brittanywood

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

d

Answer to Question 2

b


plus1

  • Hero Member
  • *****
  • Posts: 676
Reply #2 on: Jul 27, 2018
Both answers were spot on, thank you once again


brittanywood

  • Sr. Member
  • ****
  • Posts: 355
Reply #3 on: Jul 27, 2018
Great! Please up vote :D


« previous next »
 

Did you know?

Before a vaccine is licensed in the USA, the Food and Drug Administration (FDA) reviews it for safety and effectiveness. The CDC then reviews all studies again, as well as the American Academy of Pediatrics and the American Academy of Family Physicians. Every lot of vaccine is tested before administration to the public, and the FDA regularly inspects vaccine manufacturers' facilities.

Did you know?

Eat fiber! A diet high in fiber can help lower cholesterol levels by as much as 10%.

Did you know?

Malaria mortality rates are falling. Increased malaria prevention and control measures have greatly improved these rates. Since 2000, malaria mortality rates have fallen globally by 60% among all age groups, and by 65% among children under age 5.

Did you know?

Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.

Did you know?

There are 60,000 miles of blood vessels in every adult human.

Seven characteristics are common to all life Seven characteristics are common to all life
Earth’s Major Tectonic Plates Earth’s Major Tectonic Plates
The Last Man on Earth The Last Man on Earth
Astronaut Rachel leaves Earth in a spaceship at a speed of 0.960c relative to an observer on ... Astronaut Rachel leaves Earth in a spaceship at a speed of 0.960c relative to an observer on ...
Earth 150 Million Years Ago Earth 150 Million Years Ago
Earth 65 Million Years Ago Earth 65 Million Years Ago
Video: DNA close up Animation

For a complete list of videos, visit our video library