Practice Questions

TLS Online TPP Program

#Question id: 9202

Which of the following statements regarding extinction is accurate?

#SCPH06 I Botany

A large percentage of species are immune from extinction; however, rates of extinction may increase with continued human impacts.
Extinctions occur only periodically, separated by long time spans with no extinctions.
Extinction is occurring at a similar rate now as compared to historical fossil evidence.
The small-population approach is inferior to the declining-population approach if the goal is to conserve the maximum number of species in a given region.

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TLS Online TPP Program

#Question id: 9192

#SCPH06 I Botany

The oak tree pathogen Phytophthora ramorum has migrated 650 km in ten years. West Nile virus spread from New York State to 46 others states in five years. The difference in the rate of spread is probably related to

TLS Online TPP Program

#Question id: 416

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

The immediate precursors of DNA and RNA synthesis in the cell all contain:

TLS Online TPP Program

#Question id: 19477

#SCPH28 | Zoology

Cry V and Cry VI groups were added; these proteins are primarily

TLS Online TPP Program

#Question id: 3863

#SCPH05 I Biotechnology

Introns in nuclear pre-mRNAs are excised by: