TLS Online TPP Program

#Question id: 1376


Which of the following statements is NOT TRUE about gap junctions?

#Unit 4. Cell Communication and Cell Signaling
  1. Gap junctions have some functionality of permitting cells to adhere to one another.

  2. Gap junctions form channels that are comprised of connexin proteins.

  3. Gap junctions permit the travel of small molecules back and forth between adjacent cells.

  4. Gap junctions prevent molecules and ions from traveling between cells in the extracellular space.

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TLS Online TPP Program

#Question id: 12347

#Unit 10. Ecological Principles

A team of conservation biologists, surveying a population of frogs on an island, captured and marked 312 individuals in the first sample. In a second sampling, 3 days later, the team caught 140 individuals of which 26 were previously marked. The total number of frogs on the island is estimated to be . (Use decimal notation, not fractions or percentage)

TLS Online TPP Program

#Question id: 12348

#Unit 10. Ecological Principles

The following equation represents a hypothetical relationship between fitness (w) and shoot: root ratio (r) in individuals of a plant species: w = 10r-10r2. At what value of shoot: root ratio (r), do these plants achieve maximum fitness? (Use decimal notation, not fractions or percentage)

TLS Online TPP Program

#Question id: 12349

#Unit 10. Ecological Principles

Males in a population differ in the time they spend displaying to females. A researcher hypothesizes that predators are responsible for these differences. Males display for longer durations when there are no predators in the vicinity and for shorter durations when there is a predator nearby. Which of the following study designs is the most appropriate test of this hypothesis?

TLS Online TPP Program

#Question id: 12350

#Unit 10. Ecological Principles

What is the approximate current growth rate of the human population?

TLS Online TPP Program

#Question id: 12351

#Unit 10. Ecological Principles

All the resources a species could potentially use describe its ____________.

TLS Online TPP Program

#Question id: 12352

#Unit 10. Ecological Principles

Which of the following populations is most likely to go extinct?