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TLS Online TPP Program

#Question id: 8852

The upper forelimbs of humans and bats have fairly similar skeletal structures, whereas the corresponding bones in whales have very different shapes and proportions. However, genetic data suggest that all three kinds of organisms diverged from a common ancestor at about the same time. Which of the following is the most likely explanation for these data?

#SCPH28 | Zoology
  1. Humans and bats evolved by natural selection, and whales evolved by Lamarckian mechanisms.
  2. Forelimb evolution was adaptive in people and bats, but not in whales.
  3. Natural selection in an aquatic environment resulted in significant changes to whale forelimb anatomy.
  4. Genes mutate faster in whales than in humans or bats.
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TLS Online TPP Program

#Question id: 9052

#SCPH28 | Zoology

Which of the following causes seasons on Earth?
TLS Online TPP Program

#Question id: 4923

#SCPH28 | Zoology

following statement given for Genetic maternal effect are correct?

A- Characteristics are determined by nuclear gene

B- Inherited according to Mendel’s principles

C- In F3 generation, segregation of Dominant trait and recessive trait in ratio of 3:1

D) No Segregation of Trait in F2 generation 
TLS Online TPP Program

#Question id: 18373

#SCPH28 | Zoology

Scientists engineered a bacterial strain of P. fluorescens which is able to degrade 2,4-dinitrotoluene. This bacteria also helps in 
TLS Online TPP Program

#Question id: 62

#SCPH05 I Biotechnology

We can represent atoms by listing the number of protons, neutrons, and electrons—for example, 2p+, 2n0, 2e- for helium. Which of the following represents the 18O isotope of oxygen?
TLS Online TPP Program

#Question id: 1688

#I Life Science/ Life Sciences Group – I-V

Binding of antigen to antibody: