If the nitrogen atom had electronic configuration 1s⁷, it would have energy lower than that of the normal ground state configuration 1s² 2s₂ 2p³ because the electrons would be closer to the nucleus. Yet, 1s⁷ is not observed because it violates.

TLS Online TPP Program

#Question id: 8917

#XL - R Botany

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

#XL - S Microbiology

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: 8918

#XL - R Botany

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

#XL - S Microbiology

The last common ancestor of all animals was probably a

TLS Online TPP Program

#Question id: 8919

#XL - T Zoology

The last common ancestor of all animals was probably a

TLS Online TPP Program

#Question id: 8919

#XL - R Botany

The last common ancestor of all animals was probably a