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TLS Online TPP Program

#Question id: 4703

Within a few weeks of treatment with the drug 3TC, a patientʹs HIV population consists entirely of 3TC-resistant viruses. How can this result best be explained?

#Section 2: Evolution

  1. HIV can change its surface proteins and resist vaccines.

  2. The patient must have become reinfected with 3TC-resistant viruses.

  3. HIV began making drug-resistant versions of reverse transcriptase in response to the drug.

  4. A few drug-resistant viruses were present at the start of treatment, and natural selection increased their frequency.

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TLS Online TPP Program

#Question id: 11179

#Section 4: Behavioural Ecology

The defended portion of a home range is called the
TLS Online TPP Program

#Question id: 11988

#Section 1: Ecology

If mayflies lay eggs on roads instead of in water, this behavior could involve which of the following? 
TLS Online TPP Program

#Question id: 9215

#Section 5: Applied Ecology & Evolution

Use the following figure to answer the question


Five new individuals were added to a small population of bighorn sheep in 1986, and ten more were added between 1990 and 1994. According to the figure, what occurred in this population after these additions?
TLS Online TPP Program

#Question id: 11512

#Section 1: Ecology

The mortality rate of organisms following a type iii survivorship curve is
TLS Online TPP Program

#Question id: 11358

#Section 4: Behavioural Ecology

In Holling's functional responses of predators, what is the most fundamental difference between a Type I functional response versus Type II and Type III functional responses?