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TLS Online TPP Program

#Question id: 4990

Fly species W, found in a certain part of the island, produces fertile offspring with species Y. Species W does not produce fertile offspring with species X or Z. If no other species can hybridize, then species W and Y

#Unit 11. Evolution and Behavior

  1. have genomes that are still similar enough for successful meiosis to occur in hybrid flies.

  2. have more genetic similarity with each other than either did with the other two species.

  3. may fuse into a single species if their hybrids remain fertile over the course of many generations.

  4. A, B, and C

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TLS Online TPP Program

#Question id: 10314

#Unit 6. System Physiology – Plant

How many redox reaction and decarboxylation reaction participate in Kreb’s cycle?
TLS Online TPP Program

#Question id: 15746

#Unit 5. Developmental Biology

In Drosophila, if there is one X chromosome and three sets of autosomes then the fly is:
TLS Online TPP Program

#Question id: 4649

#Unit 11. Evolution and Behavior

Which statement best describes the evolution of pesticide resistance in a population of insects?
TLS Online TPP Program

#Question id: 12252

#Unit 10. Ecological Principles

In a study of interactions between plants, ants and caterpillars, the following experimental treatments were imposed: i) Control (both ants and caterpillars are present); ii) Ant removal; iii) Caterpillar removal; iv) Ant and caterpillar removal. Plus (+) indicates presence and minus (-) indicates absence on plants. The results for plant performance (growth) from this experiment  are shown in the figure below. Plant performance in all treatments were significantly different from each other. Based on these results, which of the following inferences is correct?
TLS Online TPP Program

#Question id: 1084

#Unit 4. Cell Communication and Cell Signaling

Which observation suggested to Sutherland the involvement of a second messenger in epinephrine's effect on liver cells?