Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 4392
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

  1. Natural selection cannot account for losses, but accounts only for new structures and functions.

  2. Natural selection accounts for these losses by the principle of use and disuse.

  3. Under particular circumstances that persisted for long periods, each of these structures presented greater costs than benefits.

  4. The ancestors of these organisms experienced harmful mutations that forced them to lose these structures.

More Questions
TLS Online TPP Program

#Question id: 10258

#Unit 1. Molecules and their Interaction Relevant to Biology

Arrange in the decreasing order of Lattice Energy (kj/mol)
TLS Online TPP Program

#Question id: 1402

#Unit 4. Cell Communication and Cell Signaling

Which of the following oncoproteins possess(es) protein kinase activity?
TLS Online TPP Program

#Question id: 11465

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following structure of lysine is exist at pH 6?
TLS Online TPP Program

#Question id: 11454

#Unit 7. System Physiology – Animal

The structure of the mammalian middle ear is adapted to convert ________.
TLS Online TPP Program

#Question id: 3455

#Unit 11. Evolution and Behavior

A duck egg is removed from its mother’s nest and incubated by a barnyard hen. The duckling hatches out in the presence of the barnyard hen and stays in her nest. After a couple of days, the duckling is presented with a choice between its biological mother and the hen that incubated it. The duckling approaches and follows the hen. This set of observations demonstrates the phenomenon of