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: 9578

#Unit 10. Ecological Principles

Bergmann’s rule states that,

TLS Online TPP Program

#Question id: 11192

#Unit 7. System Physiology – Animal

A graded hyperpolarization of a membrane can be induced by ________.

TLS Online TPP Program

#Question id: 13061

#Unit 13. Methods in Biology

Precision will be reduced, but yield will be increased

Optimisation of a PCR reaction is often a compromise between the competing demands for precision, efficiency and yield. Although the specific effects may vary, generally, increasing the annealing temperature will increase non-specific primer binding and reduce precision. Increasing the length of the elongation phase will reduce the proportion of incomplete newly-synthesised strands and therefore increase yield. In this case, the potential effect on efficiency is unclear. Increasing the elongation phase would increase the reaction time, but the time taken to ramp down to a lower annealing temperature would be reduced.

Arrange in the order of their increasing capacity:

TLS Online TPP Program

#Question id: 31166

#Unit 7. System Physiology – Animal

Which of the following correctly explains the after-hyperpolarization?

TLS Online TPP Program

#Question id: 11334

#Unit 10. Ecological Principles

To qualify as a biodiversity hotspot, a region must meet following two strict criteria