Practice Questions

TLS Online TPP Program

#Question id: 4605

Over long periods of time, many cave-dwelling organisms have lost their eyes. Tapeworms have lost their digestive systems. Whales have lost their hind limbs. How can natural selection account for these losses?

#Unit 11. Evolution and Behavior

Natural selection cannot account for losses, but accounts only for new structures and functions.
Natural selection accounts for these losses by the principle of use and disuse.
Under particular circumstances that persisted for long periods, each of these structures presented greater costs than benefits.
The ancestors of these organisms experienced harmful mutations that forced them to lose these structures.

More Questions

TLS Online TPP Program

#Question id: 4122

#Unit 3. Fundamental Processes

RNA Pol uses its active site, in a simple back-reaction, to catalyze the removal of an incorrectly inserted ribonucleotide. This phenomenon known as

TLS Online TPP Program

#Question id: 2662

#Unit 2. Cellular Organization

In the tryptophan operon, tryptophan serves as ________________.

TLS Online TPP Program

#Question id: 14922

#Unit 8. Inheritance Biology

Which is an example of a study that might be done by a transmission geneticist?

TLS Online TPP Program

#Question id: 12531

#Unit 6. System Physiology – Plant

The most bioactive brassin in eudicots, which is a polyhydroxylated steroid similar to animal steroid hormones that brassin is

TLS Online TPP Program

#Question id: 19149

#Unit 13. Methods in Biology

The GC trace obtained after an experiment is called a