The observation that tusks were limited to males in several species, and were apparently not used in food-gathering, is evidence that the tusks probably

TLS Online TPP Program

#Question id: 19280

#Unit 9. Diversity of Life Forms

In which of the following taxa does the mature sporophyte depend completely on the gametophyte for nutrition? 

TLS Online TPP Program

#Question id: 20997

#Unit 12. Applied Biology

CH3Br present in soil are usually biodegraded by which microorganism?

TLS Online TPP Program

#Question id: 11082

#Unit 7. System Physiology – Animal

A 67-year-old man has a solid tumor that pushes against an airway partially obstructing air flow to the distal alveoli. Which point on the ventilation-perfusion line of the O2-CO2 diagram corresponds to the alveolar gas of these distal alveoli?

TLS Online TPP Program

#Question id: 902

#Unit 1. Molecules and their Interaction Relevant to Biology

Which demonstrates that the primary structure of a protein determines its tertiary structure?

TLS Online TPP Program

#Question id: 3276

#Unit 11. Evolution and Behavior

Which of these conditions are always true of populations evolving due to natural selection?

Condition 1: The population must vary in traits that are heritable.

Condition 2: Some heritable traits must increase reproductive success.

Condition 3: Individuals pass on most traits that they acquire during their lifetime.