Practice Questions

TLS Online TPP Program

#Question id: 4619

Within six months of effectively using methicillin to treat S. aureus infections in a community, all new S.aureus infections were caused by MRSA. How can this best be explained?

#Section 2: Evolution

A patient must have become infected with MRSA from another community.
In response to the drug, S. aureus began making drug-resistant versions of the protein targeted by the drug.
Some drug-resistant bacteria were present at the start of treatment, and natural selection increased their frequency.
S. aureus evolved to resist vaccines.

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TLS Online TPP Program

#Question id: 12287

#Section 1: Ecology

Food chains are sometimes short because

TLS Online TPP Program

#Question id: 10893

#Section 2: Evolution

The ___________ holds that two species with the same ecological requirements cannot coexist.

TLS Online TPP Program

#Question id: 10657

#Section 2: Evolution

Assuming these age-structure diagrams describe human populations, in which population is unemployment likely to be a societal issue in the future?

TLS Online TPP Program

#Question id: 12333

#Section 1: Ecology

TLS Online TPP Program

#Question id: 10864

#Section 2: Evolution

Which of the following represent ways in which two ecologically similar species can avoid competing with each other?