Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 16421
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?

#XL - S Microbiology

  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: 15603

#XL - S Microbiology

Novel antibiotic can be made by
TLS Online TPP Program

#Question id: 369

#XL - S Microbiology

Calculate the pH of a 2.0 L solution containing 10 mL of 5 M acetic acid and 10 mL of 1 M sodium acetate. (pKa = 4.76)
TLS Online TPP Program

#Question id: 3860

#XL - Q Biochemistry

Guide RNAs:
TLS Online TPP Program

#Question id: 4607

#XL - S Microbiology

Members of two different species possess a similar-looking structure that they use in a similar way to perform about the same function. Which of the following would suggest that the relationship more likely represents homology instead of convergent evolution?
TLS Online TPP Program

#Question id: 27527

#XL - U Food Technology

The vitamins which are lost most readily during cooking are: