This topic contains a solution. Click here to go to the answer

Author Question: What is a probable reason why land species represent 86 of the world's species, whereas marine ... (Read 146 times)

lunatika

  • Hero Member
  • *****
  • Posts: 548
What is a probable reason why land species represent 86 of the world's species, whereas marine species only represent 14?
 
  a) There is more land on Earth than there is ocean.
  b) Water slows down the evolutionary process.
  c) The more variable the environment, the more chances there will be for new species to form, and the ocean is more stable than the land environment.
  d) An underwater cataclysmic event during the Pleistocene killed many marine species, which reduced the previously abundant marine species count to less than the number of land species.

Question 2

Many of the unique properties of water, such as cohesion and its reputation as a universal solvent, come from its atomic structure. What causes these properties?
 
  a) Atoms in water molecules are stuck together with atomic bonds.
  b) Atoms in water molecules are stuck together with covalent bonds.
  c) Water molecules are electrically polarized.
  d) Water molecules contain sodium (Na) ions that break down substances.
  e) Many other ions can substitute for the hydrogen (H) atoms in a water molecule.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

miss.ashley

  • Sr. Member
  • ****
  • Posts: 371
Answer to Question 1

C

Answer to Question 2

C





 

Did you know?

If you use artificial sweeteners, such as cyclamates, your eyes may be more sensitive to light. Other factors that will make your eyes more sensitive to light include use of antibiotics, oral contraceptives, hypertension medications, diuretics, and antidiabetic medications.

Did you know?

The FDA recognizes 118 routes of administration.

Did you know?

The term bacteria was devised in the 19th century by German biologist Ferdinand Cohn. He based it on the Greek word "bakterion" meaning a small rod or staff. Cohn is considered to be the father of modern bacteriology.

Did you know?

Parkinson's disease is both chronic and progressive. This means that it persists over a long period of time and that its symptoms grow worse over time.

Did you know?

An identified risk factor for osteoporosis is the intake of excessive amounts of vitamin A. Dietary intake of approximately double the recommended daily amount of vitamin A, by women, has been shown to reduce bone mineral density and increase the chances for hip fractures compared with women who consumed the recommended daily amount (or less) of vitamin A.

For a complete list of videos, visit our video library