« previous next »

Author Question: Which of these might have been observed in the common ancestor of chondrichthyan (Read 791 times)

federox

  • Sr. Member
  • ****
  • Posts: 308
on: Aug 8, 2013
Which of these might have been observed in the common ancestor of chondrichthyans and osteichthyans?
A) a mineralized, bony skeleton
B) opercula
C) bony fin rays
D) a spiral valve intestine
E) a swim bladder


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

vinney12

  • Hero Member
  • *****
  • Posts: 586
Reply #2 on: Sep 9, 2014
Thank you!


« previous next »
 

Did you know?

Cocaine was isolated in 1860 and first used as a local anesthetic in 1884. Its first clinical use was by Sigmund Freud to wean a patient from morphine addiction. The fictional character Sherlock Holmes was supposed to be addicted to cocaine by injection.

Did you know?

Asthma occurs in one in 11 children and in one in 12 adults. African Americans and Latinos have a higher risk for developing asthma than other groups.

Did you know?

Symptoms of kidney problems include a loss of appetite, back pain (which may be sudden and intense), chills, abdominal pain, fluid retention, nausea, the urge to urinate, vomiting, and fever.

Did you know?

Though “Krazy Glue” or “Super Glue” has the ability to seal small wounds, it is not recommended for this purpose since it contains many substances that should not enter the body through the skin, and may be harmful.

Did you know?

Vaccines prevent between 2.5 and 4 million deaths every year.

A Common wild boar piglet in the Netherlands A Common wild boar piglet in the Netherlands
Common drainage devices; A.Penrose Drain; B. Hemovac; Common drainage devices; A.Penrose Drain; B. Hemovac;
Common skin signs are often evidence of an illness or disorder. An erosion or ulcer is an eating or ... Common skin signs are often evidence of an illness or disorder. An erosion or ulcer is an eating or ...
Common Abbreviations and Symbols Used by Massage Therapists Cont. Common Abbreviations and Symbols Used by Massage Therapists Cont.
Incidence of the Ten Most Common Cancers Incidence of the Ten Most Common Cancers
Video: The Krebs Cycle Animation

For a complete list of videos, visit our video library