Practice Questions

TLS Online TPP Program

#Question id: 12576

Estimates of current rates of extinction

#10. Ecological Principles

Indicate that we have reached a state of stable equilibrium in which speciation and extinction rates are approximately equal.
Suggest that one-half of all animal and plant species may be gone by the year 2100.
Indicate that rates may be greater than the mass extinctions at the close of the Cretaceous period.
Indicate that only 1% of all of the species that have ever lived on Earth are still alive.

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TLS Online TPP Program

#Question id: 12372

#10. Ecological Principles

In a particular case of secondary succession, three species of wild grass all invaded a field. By the second season, a single species dominated the field. A possible factor in this secondary succession was

TLS Online TPP Program

#Question id: 3461

#11. Evolution and Behavior

the most common way that altruism between related individuals evolves and results from

TLS Online TPP Program

#Question id: 10960

#7. System Physiology – Animal

Why do some malnourished patients bleed excessively when injured?

TLS Online TPP Program

#Question id: 11335

#10. Ecological Principles

Which of the following have minimum NET PRIMARY PRODUCTIVITY ?

TLS Online TPP Program

#Question id: 16325

#7. System Physiology – Animal

Symptoms of Moderate Anxiety: