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TLS Online TPP Program

#Question id: 8926

Sponges and cnidarians are among the fossilized animals found in both the Ediacara Hills and the Burgess Shale from the Rocky Mountains of British Colombia. This observation requires that

#SCPH06 I Botany
  1. ancestral sponges and cnidarians had formerly been terrestrial animals.
  2. North America and Australia were united to each other about 550 million years ago (mya).
  3. land that now comprises the Ediacara Hills and the Rocky Mountains was underwater about 550 million years ago.
  4. only sponges and cnidarians existed at the time the sediments were deposited.
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TLS Online TPP Program

#Question id: 8919

#SCPH05 I Biotechnology

The last common ancestor of all animals was probably a
TLS Online TPP Program

#Question id: 5562

#SCPH01 Biochemistry

In an egg cell treated with a chemical that binds calcium and magnesium ions, the ________.
TLS Online TPP Program

#Question id: 1081

#SCPH01 Biochemistry

Which of the following is a type of local signaling in which a cell secretes a signal molecule that affects neighboring cells?
TLS Online TPP Program

#Question id: 1604

#SCPH01 Biochemistry

Many viruses produce a protein immunoevasin that interferes with antigen presentation by MHC class I molecules. The immunoevasin interfere MHC presentation by
TLS Online TPP Program

#Question id: 11265

#SCPH28 | Zoology

Approximately how many kg of carnivore production can be supported by a field plot containing 2000 kg of plant material?