Practice Questions

TLS Online TPP Program

#Question id: 10708

Which of the following statements is a likely explanation for why invasive species take over communities into which they have been introduced?

#XL - T Zoology

Invasive species are less efficient than native species in competing for the limited resources of the environment.
Invasive species are not held in check by the predators and agents of disease that have always been in place for native species.
Invasive species have a higher reproductive potential than native species.
Invasive species come from geographically isolated regions, so when they are introduced to regions where there is more competition, they thrive

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TLS Online TPP Program

#Question id: 15524

#XL - S Microbiology

The bulk of DP thymocyte death (~95%) occurs among thymocytes that fail positive selection because

TLS Online TPP Program

#Question id: 18385

#XL - S Microbiology

Oil is a natural product, has many components and is biodegradable, the different components being degraded at different rates but still oil spills are considered as recalciterants because

TLS Online TPP Program

#Question id: 13233

#XL - R Botany

TLS Online TPP Program

#Question id: 19932

#XL - P Chemistry

If ionising energy of H atom is 13.6 eV, then the second ionising energy of He should be

TLS Online TPP Program

#Question id: 3939

#XL - Q Biochemistry

When used to describe the RNA polymerases, the term “processive” refers to: