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TLS Online TPP Program

#Question id: 5001

Fossil evidence indicates that several kinds of flightless dinosaurs possessed feathers. If some of these feather-bearing dinosaurs incubated clutches of eggs in carefully constructed nests, this might be evidence supporting the claim that

#Unit 11. Evolution and Behavior

  1. dinosaurs were as fully endothermal (warm-blooded) as modern birds and mammals.

  2. their feathers originally served as insulation, and only later became flight surfaces.

  3. the earliest reptiles could fly, and the feathers of flightless dinosaurs were vestigial flight surfaces.

  4. the feathers were plucked from the bodies of other adults to provide nest-building materials.

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TLS Online TPP Program

#Question id: 9212

#Unit 9. Diversity of Life Forms

Burning fossil fuels releases oxides of sulfur and nitrogen. These air pollutants can be responsible for ________.
TLS Online TPP Program

#Question id: 8718

#Unit 9. Diversity of Life Forms

Which of the following would, if it had acted upon a gene, prevent this gene from acting as a reliable molecular clock?
TLS Online TPP Program

#Question id: 15366

#Unit 4. Cell Communication and Cell Signaling

For pro-proliferation signaling pathways to cause uncontrolled proliferation, as is seen in cancer, this p53 up-regulation must not occur, It is therefore not surprising that p53 is inactive in most human tumors through loss of p53 function itself, down-regulation of positive regulators (PR) of p53 or up-regulation of negative regulators (NR) of p53, these regulators are accordingly
TLS Online TPP Program

#Question id: 18380

#Unit 12. Applied Biology

A commonly used municipal wastewater treatment to restart activated sludge bioreactors. Which technique is involved in this remediation process?
TLS Online TPP Program

#Question id: 7280

#Unit 5. Developmental Biology

In drosophila, Physical forces drive invagination of the ventral furrow. Following statements regarding to this process:

A. The cellularized blastoderm will begin to activate higher levels of myosin in the cells at the ventral midline and preferentially at their apical surface.

B. Epithelial adhesions paired with differential activation of dynein and tissue geometry create mechanical constraints that affect the orientation of actomyosin meshworks.

C. The A/P oriented arrays of myosin in the cells at the ventral midline generate tension along the anterior-posterior axis.

D. The combination of tissue geometry and tension of these anterior-to-posterior meshworks cause the tissue to fold outward at a right angle to the anterior-posterior axis, creating a long and narrow ventral furrow.

Which of the following statements are incorrect?