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TLS Online TPP Program

#Question id: 338

What is the difference between covalent bonds and ionic bonds?

#Section 2: General Biology

  1. Covalent bonds involve the sharing of pairs of electrons between atoms; ionic bonds involve the sharing of single electrons between atoms.

  2. Covalent bonds involve the sharing of electrons between atoms; ionic bonds involve the electrical attraction between charged atoms.

  3. Covalent bonds involve the sharing of electrons between atoms; ionic bonds involve the sharing of protons between charged atoms.

  4. Covalent bonds involve the transfer of electrons between charged atoms; ionic bonds involve the sharing of electrons between atoms.

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TLS Online TPP Program

#Question id: 8915

#Section 6: Plant, Animal and Microbial Biotechnology

The number of legs an insect has, the number of vertebrae in a vertebral column, or the number of joints in a digit (such as a finger) are all strongly influenced by
TLS Online TPP Program

#Question id: 8916

#Section 6: Plant, Animal and Microbial Biotechnology

What do animals as diverse as corals and monkeys have in common?
TLS Online TPP Program

#Question id: 8917

#Section 6: Plant, Animal and Microbial Biotechnology

The Hox genes came to regulate each of the following in what sequence, from earliest to most recent?
1. identity and position of paired appendages in protostome embryos
2. formation of water channels in sponges
3. anterior-posterior orientation of segments in protostome embryos
4. positioning of tentacles in cnidarians
5. anterior-posterior orientation in vertebrate embryos
TLS Online TPP Program

#Question id: 8918

#Section 6: Plant, Animal and Microbial Biotechnology

In individual insects of some species, whole chromosomes that carry larval genes are eliminated from the genomes of somatic cells at the time of metamorphosis. A consequence of this occurrence is that
TLS Online TPP Program

#Question id: 8919

#Section 6: Plant, Animal and Microbial Biotechnology

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

#Question id: 8921

#Section 6: Plant, Animal and Microbial Biotechnology

Evidence of which structure or characteristic would be most surprising to find among fossils of the Ediacaran fauna?