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TLS Online TPP Program

#Question id: 9605

A phylogenetic tree that is ʺrootedʺ is one

#XL - S Microbiology
  1. that extends back to the origin of life on Earth.
  2. at whose base is located the common ancestor of all taxa depicted on that tree.
  3. that illustrates the rampant gene swapping that occurred early in lifeʹs history.
  4. that indicates our uncertainty about the evolutionary relationships of the taxa depicted on the tree.
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TLS Online TPP Program

#Question id: 372

#XL - S Microbiology

Carbon dioxide in the atmosphere dissolves with the raindrops. The pH of raindrops is ________.
TLS Online TPP Program

#Question id: 372

#XL - Q Biochemistry

Carbon dioxide in the atmosphere dissolves with the raindrops. The pH of raindrops is ________.
TLS Online TPP Program

#Question id: 373

#XL - S Microbiology

What is the hydroxyl ion (OH-) concentration of a solution of pH 8?
TLS Online TPP Program

#Question id: 373

#XL - Q Biochemistry

What is the hydroxyl ion (OH-) concentration of a solution of pH 8?
TLS Online TPP Program

#Question id: 374

#XL - S Microbiology

The pH of a sample of blood is 7.4, while gastric juice is pH 1.4.  The blood sample has:
TLS Online TPP Program

#Question id: 374

#XL - Q Biochemistry

The pH of a sample of blood is 7.4, while gastric juice is pH 1.4.  The blood sample has: