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TLS Online TPP Program

#Question id: 15416

Which of the following statements are regarding to lens induction in xenopus is incorrect?

#Part-A Aptitude & General Biotechnology
  1. Lens induction can be achieved in the presence of optic vesicle after priming of head ectoderm by the anterior neural plate.
  2. The optic vesicle can induce the presumptive head ectoderm to form the lens.
  3. Under the influence of factors secreted by the lens, the optic vesicle becomes retina.
  4. The anterior neural plate primes the head ectoderm via BMP4 and Fgf8 prior to signals from the optic vesicle.
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TLS Online TPP Program

#Question id: 8923

#Part-A Aptitude & General Biotechnology

Which of these genetic processes may be most helpful in accounting for the Cambrian explosion?
TLS Online TPP Program

#Question id: 8923

#Part-B Specialized Branches in Biotechnology

Which of these genetic processes may be most helpful in accounting for the Cambrian explosion?
TLS Online TPP Program

#Question id: 8924

#Part-A Aptitude & General Biotechnology

Fossil evidence indicates that the following events occurred in what sequence, from earliest to most recent?
1. Protostomes invade terrestrial environments.
2. Cambrian explosion occurs.
3. Deuterostomes invade terrestrial environments.
4. Vertebrates become top predators in the seas.
TLS Online TPP Program

#Question id: 8924

#Part-B Specialized Branches in Biotechnology

Fossil evidence indicates that the following events occurred in what sequence, from earliest to most recent?
1. Protostomes invade terrestrial environments.
2. Cambrian explosion occurs.
3. Deuterostomes invade terrestrial environments.
4. Vertebrates become top predators in the seas.
TLS Online TPP Program

#Question id: 8925

#Part-A Aptitude & General Biotechnology

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
TLS Online TPP Program

#Question id: 8926

#Part-A Aptitude & General Biotechnology

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