1.2 Concept And Uses Of Classification Systems

Which statement correctly describes the purpose of biological classification systems?

A scientist observes that horses and donkeys can mate and produce offspring called mules. However, mules cannot reproduce. What does this evidence demonstrate?

In the binomial system, the scientific name Panthera leo refers to which organism?

Which rule must be followed when writing binomial names?

A student constructs a dichotomous key to identify local birds. At each step, which approach would be most effective?

Calculate the number of steps needed in a dichotomous key to identify one specific organism from a group of 16 different species.

Two species of bacteria isolated from different continents show 94% similarity in their DNA base sequences. What does this high similarity most likely indicate?

A marine biologist studying cetaceans finds that dolphins and whales have very similar DNA sequences, while dolphins and sharks have very different sequences despite their similar body shapes. This evidence supports which classification principle?

Which scenario would most likely require reclassification of organisms using modern DNA analysis?

A taxonomist discovers that two organisms previously classified in different families actually share 89% DNA sequence similarity. The current classification was based on their very different physical appearances. What should the taxonomist conclude?