The Classification of Living Organisms (IB)

According to natural classification, organisms in the same group had what in common?

• Morphology

• Anatomical characteristic

• Modes of nutrition

• Common ancestry

The diagram below represents the three domains of life. Which choice has the correct names for the domains?

• 1 - Archea

  2 - Prokaryotes

  3 - Eukaryotes

• 1 - Protistae

  2 - Prokaryota

  3 - Eukaryota

• 1 - Protistae

  2 - Eubacteria

  3 - Eukaryota

• 1 - Eubacteria

  2 - Archaea

  3 - Eukaryota

According to the cladogram, which two primates are the most closely related?

• New world monkeys and old world monkeys

• Lorises and lemurs

• Lemurs and humans

• Apes and humans

What information can be deduced from the cladogram?

• Lorises and Tarsiers share a common ancestor.

• Old world monkeys and New world monkeys have the same DNA sequences.

• Human and Lemur species are the same age.

• Tarsiers and Lemurs do not share a common ancestor.

The image shows the skulls of a gorilla, chimpanzee, and human. What conclusion can be drawn from the anatomies of the skulls?

• Gorillas and chimpanzees are more closely related to each other than they are to humans

• Humans are more intelligent than chimpanzees and gorillas

• Gorillas, chimpanzees and humans share a recent common ancestor

• Chimpanzees and gorillas have a diploid chromosome number of 48, whereas humans have a diploid chromosome number of 46