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TLS Online TPP Program

#Question id: 11204

Why do Na+ ions enter the cell when voltage-gated Na+ channels are opened in neurons?

#Part-B Specialized Branches in Biotechnology

  1. because the Na+ concentration is much lower outside the cell than it is inside

  2. because the Na+ ions are actively transported by the sodium-potassium pump into the cell

  3. because the Na+ concentration is much higher outside the cell than it is inside, and the Na+ ions are attracted to the negatively charged interior

  4. because the Na+ concentration is much higher outside the cell than it is inside, and the Na+ ions are actively transported by the sodium-potassium pump into the cell

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TLS Online TPP Program

#Question id: 8922

#Part-A Aptitude & General Biotechnology

Which statement is most consistent with the hypothesis that the Cambrian explosion was caused by the rise of predator-prey relationships?
TLS Online TPP Program

#Question id: 8922

#Part-B Specialized Branches in Biotechnology

Which statement is most consistent with the hypothesis that the Cambrian explosion was caused by the rise of predator-prey relationships?
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.