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TLS Online TPP Program

#Question id: 11380

Which of the following is/are NOT valid explanation(s) for the observed pattern of species richness?

#SCPH06 I Botany
  1. Older communities are more species rich.

  2. Large areas support more species.

  3. Absence of Natural enemies, area with more species richness
  4. Greater productivity permits existence of more species
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TLS Online TPP Program

#Question id: 7011

#SCPH01 Biochemistry

The vertebrate brain and spinal cord start their development as a flat plate of neuroepithelial cells that folds up along most of its length to form a tube. The process of forming this neural tube is called neurulation. Which of the following signals play important role in both neurulation and cell fate patterning of neural tube?
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#Question id: 1264

#SCPH06 I Botany

 Desmosomes
TLS Online TPP Program

#Question id: 5115

#SCPH01 Biochemistry

At the time of mid-blastula transition which of the following event not occur?
TLS Online TPP Program

#Question id: 18615

#SCPH06 I Botany

PCR efficiency is influenced by several factors, the efficiency declines due to
a) efficiency of amplification declines with an increase in the length of the target sequence.
b) Efficiency of PCR is affected by primer length; it declines if the primers used for PCR arc too long.
c) a temperature higher than the ideal annealing temperature reduces PCR efficiency.
d)  primers used for PCR have complementary regions, dimers will be formed, and PCR efficiency will decline.
TLS Online TPP Program

#Question id: 5103

#SCPH01 Biochemistry

The arrangement of organs and tissues in their characteristic places in 3-D space defines ________.