« previous next »

Author Question: The most ancient branch point in animal phylogeny is that between having A) radi (Read 986 times)

hummingbird

  • Sr. Member
  • ****
  • Posts: 324
on: Aug 2, 2013
The most ancient branch point in animal phylogeny is that between having
A) radial or bilateral symmetry.
B) a well-defined head or no head.
C) diploblastic or triploblastic embryos.
D) true tissues or no tissues.
E) a body cavity or no body cavity.


geoffrey

  • Hero Member
  • *****
  • Posts: 880
Reply #1 on: Aug 3, 2013
Best answer would be D.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

hummingbird

  • Sr. Member
  • ****
  • Posts: 324
Reply #2 on: Aug 7, 2013
Great help lol Thanks


« previous next »
 

Did you know?

Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.

Did you know?

Allergies play a major part in the health of children. The most prevalent childhood allergies are milk, egg, soy, wheat, peanuts, tree nuts, and seafood.

Did you know?

Astigmatism is the most common vision problem. It may accompany nearsightedness or farsightedness. It is usually caused by an irregularly shaped cornea, but sometimes it is the result of an irregularly shaped lens. Either type can be corrected by eyeglasses, contact lenses, or refractive surgery.

Did you know?

There are immediate benefits of chiropractic adjustments that are visible via magnetic resonance imaging (MRI). It shows that spinal manipulation therapy is effective in decreasing pain and increasing the gaps between the vertebrae, reducing pressure that leads to pain.

Did you know?

Automated pill dispensing systems have alarms to alert patients when the correct dosing time has arrived. Most systems work with many varieties of medications, so patients who are taking a variety of drugs can still be in control of their dose regimen.

Development of an atherosclerotic plaque that progressively narrows the lumen of an artery to the po Development of an atherosclerotic plaque that progressively narrows the lumen of an artery to the po
Chimpanzees in the Gombe National Park, Tanzania groom each other by holding an overhead branch with Chimpanzees in the Gombe National Park, Tanzania groom each other by holding an overhead branch with
Structure of an animal cell Structure of an animal cell
How to find the point of intersection of two straight lines by graphing How to find the point of intersection of two straight lines by graphing
Consumption of animal products "استهلاك المنتجات الحيوانية" Consumption of animal products "استهلاك المنتجات الحيوانية"
Red Spotted Newt (Notophthalmus v. viridescens), New Hampshire state animal. Red Spotted Newt (Notophthalmus v. viridescens), New Hampshire state animal.
Video: Secretin (inhibiting gastric acid secretion), Cholecystokinin (fat digestion) & Cholecystokinin

For a complete list of videos, visit our video library