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TLS Online TPP Program

#Question id: 8925

What is the probable sequence in which the following clades of animals originated, from earliest to most recent?
1. tetrapods
2. vertebrates
3. deuterostomes
4. amniotes
5. bilaterians

#XL - R Botany
  1. 5 → 3 → 2 → 4 → 1
  2. 5 → 3 → 2 → 1 → 4
  3. 5 → 3 → 4 → 2 → 1
  4. 3 → 5 → 4 → 2 → 1
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TLS Online TPP Program

#Question id: 58

#XL - Q Biochemistry

A covalent chemical bond is one in which ________.
TLS Online TPP Program

#Question id: 59

#XL - Q Biochemistry

Nitrogen (N) normally forms three covalent bonds with a valence of five. However, ammonium has four covalent bonds, each to a different hydrogen (H) atom (H has a valence of one). What do you predict to be the charge on ammonium?
TLS Online TPP Program

#Question id: 61

#XL - Q Biochemistry

Which of the following correctly describes chemical equilibrium?
TLS Online TPP Program

#Question id: 78

#XL - T Zoology

Which is true about naturally occurring monosaccharides?
TLS Online TPP Program

#Question id: 79

#XL - T Zoology

The structure of D-arabinose is shown below. How many stereoisomers are possible for this molecule?
TLS Online TPP Program

#Question id: 80

#XL - T Zoology

 Examine the Fischer projection below. How is this carbohydrate classified