Practice Questions

TLS Online TPP Program

#Question id: 4959

If a fossil is encased in a stratum of sedimentary rock without any strata of igneous rock (e.g., lava, volcanic ash) nearby, then it should be

#XL - S Microbiology

easy to determine the absolute age of the fossil, because the radioisotopes in the sediments will not have been ʺresetʺ by the heat of the igneous rocks.
easy to determine the absolute age of the fossil, because the igneous rocks will not have physically obstructed the deposition of sediment of a single age next to the fossil.
difficult to determine the absolute age of the fossil, because the ʺmarker fossilsʺ common to igneous rock will be absent.
difficult to determine the absolute age of the fossil, because radiometric dating of sedimentary rock is less accurate than that of igneous rock.

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TLS Online TPP Program

#Question id: 7291

#XL - R Botany

Five different genes are known to specify floral organ identity in Arabidopsis: APETALA1 (AP1), APETALA2 (AP2), APETALA3 (AP3), PISTILLATA (PI), and AGAMOUS (AG).

Which one of the following statement is incorrect?

TLS Online TPP Program

#Question id: 31580

#XL - S Microbiology

What happens to bacterial cells during the Lag Phase?

TLS Online TPP Program

#Question id: 343

#XL - S Microbiology

Assume that acid rain has lowered the pH of a particular lake to pH 5.0. What is the hydroxide ion concentration of this lake?

TLS Online TPP Program

#Question id: 4971

#XL - S Microbiology