« previous next »

Author Question: Some animals that lived 530 million years ago resembled lancelets but had a brai (Read 630 times)

federox

  • Sr. Member
  • ****
  • Posts: 308
on: Aug 8, 2013
Some animals that lived 530 million years ago resembled lancelets but had a brain and a skull. These animals may represent
A) the first chordates.
B) a "missing link" between urochordates and cephalochordates.
C) early craniates.
D) marsupials.
E) nontetrapod gnathostomes.


theo

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


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Vampire bats have a natural anticoagulant in their saliva that permits continuous bleeding after they painlessly open a wound with their incisors. This capillary blood does not cause any significant blood loss to their victims.

Did you know?

A cataract is a clouding of the eyes' natural lens. As we age, some clouding of the lens may occur. The first sign of a cataract is usually blurry vision. Although glasses and other visual aids may at first help a person with cataracts, surgery may become inevitable. Cataract surgery is very successful in restoring vision, and it is the most frequently performed surgery in the United States.

Did you know?

Once thought to have neurofibromatosis, Joseph Merrick (also known as "the elephant man") is now, in retrospect, thought by clinical experts to have had Proteus syndrome. This endocrine disease causes continued and abnormal growth of the bones, muscles, skin, and so on and can become completely debilitating with severe deformities occurring anywhere on the body.

Did you know?

Every flu season is different, and even healthy people can get extremely sick from the flu, as well as spread it to others. The flu season can begin as early as October and last as late as May. Every person over six months of age should get an annual flu vaccine. The vaccine cannot cause you to get influenza, but in some seasons, may not be completely able to prevent you from acquiring influenza due to changes in causative viruses. The viruses in the flu shot are killed—there is no way they can give you the flu. Minor side effects include soreness, redness, or swelling where the shot was given. It is possible to develop a slight fever, and body aches, but these are simply signs that the body is responding to the vaccine and making itself ready to fight off the influenza virus should you come in contact with it.

Did you know?

There are approximately 3 million unintended pregnancies in the United States each year.

European wildcat feeding its kittens, as illustrated in Brehm's Life of Animals European wildcat feeding its kittens, as illustrated in Brehm's Life of Animals
How do you set yourself apart in a country so rich that of its 4.6 million people, 79,000 are ... How do you set yourself apart in a country so rich that of its 4.6 million people, 79,000 are ...
A Global Bloom: Cities With Over One Million Residents A Global Bloom: Cities With Over One Million Residents
Therapy Animals Therapy Animals
What amount was invested 35 years ago at 7% compounded semiannually if the value of the ... What amount was invested 35 years ago at 7% compounded semiannually if the value of the ...
Tracing numbers and alphabets by nat 3 years old Tracing numbers and alphabets by nat 3 years old
Video: Magnetic resonance imaging (MRI)

For a complete list of videos, visit our video library