« previous next »

Author Question: Which of these characteristics added most to vertebrate success in relatively dr (Read 630 times)

federox

  • Sr. Member
  • ****
  • Posts: 308
on: Aug 8, 2013
Which of these characteristics added most to vertebrate success in relatively dry environments?
A) the shelled, amniotic egg
B) the ability to maintain a constant body temperature
C) two pairs of appendages
D) bony scales
E) a four-chambered heart


theo

  • Hero Member
  • *****
  • Posts: 698
Reply #1 on: Aug 10, 2013
Answer has to be A, 100% :D


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Nitroglycerin is used to alleviate various heart-related conditions, and it is also the chief component of dynamite (but mixed in a solid clay base to stabilize it).

Did you know?

Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.

Did you know?

Oliver Wendell Holmes is credited with introducing the words "anesthesia" and "anesthetic" into the English language in 1846.

Did you know?

About 600,000 particles of skin are shed every hour by each human. If you live to age 70 years, you have shed 105 pounds of dead skin.

Did you know?

Congestive heart failure is a serious disorder that carries a reduced life expectancy. Heart failure is usually a chronic illness, and it may worsen with infection or other physical stressors.

The evolution of the vertebrate jaw The evolution of the vertebrate jaw
Chordate characteristics Chordate characteristics
Representative vertebrate circulatory systems. Representative vertebrate circulatory systems.
Splash blending occurs when the ethanol is added to a tanker with gasoline and is mixed as the ... Splash blending occurs when the ethanol is added to a tanker with gasoline and is mixed as the ...
Where Are All These Added Sugars Coming From? Where Are All These Added Sugars Coming From?
Determine the mass of a nonvolatile, nonionizing compound that must be added to 4.76 kg of ... Determine the mass of a nonvolatile, nonionizing compound that must be added to 4.76 kg of ...
Video: Forming urine ( influencing factors), Forming dilute urine & Forming concentrated urine

For a complete list of videos, visit our video library