Quiz 2

Question 1

Chloroplasts and mitochondria apparently evolved from free-living bacteria? What is this called?

Answer 1

endosymbiosis

Question 2

All large multicellular animals are members of the group

Answer 2

Eukarya (aka Eukaryota)

Question 3

All known life on earth shows fundamental similarities. These include

Answer 3

• universal genetic code based on DNA
• DNA molecules using the same four nucleotides
• DNA encoding the same 20 L-isomer amino acids

Question 4

Darwin noticed that the human arm, seal flipper, and bat wing all showed the same fundamental set of bones. He argued that this similarity was the sign of

Answer 4

Common ancestry

Question 5

The oldest known surviving solids that were produced on earth are called

Answer 5

Zircons

Question 6

So far, the oldest reliable fossils on earth represent colonies of cyanobacteria dated at 3.45 billion year old. These are called

Answer 6

stromatolites

Question 7

Fossils can sometimes reveal the color of long-extinct creatures. For example, a 150-million year old dinosaur showed evidence of feathers with colors produced by

Answer 7

melanosomes

Question 8

Homology can be defined as similarity due to

Answer 8

inheritance

Question 9

A carbon-14 atom contains 6 protons. How many neutrons?

Answer 9

8

Question 10

Each radioactive isotope has a distinctive decay rate, known as its

Answer 10

Half-life