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.

More Questions

TLS Online TPP Program

#Question id: 769

#1. Molecules and their Interaction Relevant to Biology

MicroRNAs are developed from:

TLS Online TPP Program

#Question id: 21241

#7. System Physiology – Animal

A 45-year-old female who had never needed to wear glasses experienced difficulty reading a menu in a dimly-lit restaurant. She then recalled that as of late she needed to have the newspaper closer to her eyes in order to read it. A friend recommended she purchase reading glasses. Visual accommodation involves

TLS Online TPP Program

#Question id: 3691

#3. Fundamental Processes

DNA polymerase III holoenzyme possesses:

TLS Online TPP Program

#Question id: 843

#1. Molecules and their Interaction Relevant to Biology

_______ enzymes that catalyze isomerization reactions in folding pathways of some proteins.

TLS Online TPP Program

#Question id: 3002

#2. Cellular Organization

Cells are most sensitive to penicillin during which phase of the growth curve?