« previous next »

Author Question: The most ancient branch point in animal phylogeny is that between having A) radi (Read 1018 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?

Though Candida and Aspergillus species are the most common fungal pathogens causing invasive fungal disease in the immunocompromised, infections due to previously uncommon hyaline and dematiaceous filamentous fungi are occurring more often today. Rare fungal infections, once accurately diagnosed, may require surgical debridement, immunotherapy, and newer antifungals used singly or in combination with older antifungals, on a case-by-case basis.

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?

Pink eye is a term that refers to conjunctivitis, which is inflammation of the thin, clear membrane (conjunctiva) over the white part of the eye (sclera). It may be triggered by a virus, bacteria, or foreign body in the eye. Antibiotic eye drops alleviate bacterial conjunctivitis, and antihistamine allergy pills or eye drops help control allergic conjunctivitis symptoms.

Did you know?

Complications of influenza include: bacterial pneumonia, ear and sinus infections, dehydration, and worsening of chronic conditions such as asthma, congestive heart failure, or diabetes.

animal cell animal cell
When the cover is removed from the top of the engine, a mouse or some other animal nest is ... When the cover is removed from the top of the engine, a mouse or some other animal nest is ...
Common trigger point locations, anterior and posterior. Common trigger point locations, anterior and posterior.
Where’s the Saturated Fat in Your Foods? Saturated fat is found in animal products, tropical oils Where’s the Saturated Fat in Your Foods? Saturated fat is found in animal products, tropical oils
A generalized animal cell A generalized animal cell
The molality of a C12H23O11 solution is 0.6 m. what is the freezing point of the solution C? The molality of a C12H23O11 solution is 0.6 m. what is the freezing point of the solution C?
Video: Introduction to Epilepsy

For a complete list of videos, visit our video library