Bio. Ch. 17 Review – The History of Life – Flashcards

Unlock all answers in this set

Unlock answers
question
Scientists who specialize in the study of fossils are called...
answer
Paleontologists
question
Sedimentary rocks form when layers of small particles are compressed...
answer
Under water
question
Radioactive dating of rock samples is a method of...
answer
Absolute dating
question
Half-life is the length of time required for half the atoms in a radioactive sample to...
answer
Decay
question
Earths first atmosphere contained little or no
answer
Oxygen
question
In Miller and Urey's experiments with the origin of life-forms, electric sparks were passed through a mixture of gases to: A. Simulate temperature B. Simulate sunlight C. Sterilize the gases D. Simulate lightning
answer
D. Simulate lightning
question
Outlines of ancient cells that are preserved well enough to identify them as prokaryotes are called...
answer
Microfossils
question
Which event occurred at the end of the Paleozoic Era?
answer
Mass extinction
question
The process that produces a similar appearance among unrelated groups of organisms is...
answer
Convergent evolution
question
As a group, the large-scale evolutionary changes that take place over long periods of time are called...
answer
Macroevolution
question
Which of the following is a characteristic of an index fossil? **the answer can be one or more choices** I. Distinctive species II. Lived in a wide geographic range III. Lived for a long period of time
answer
I. and II.
question
In which geologic era do you live?
answer
Cenozoic
question
The endosymbiosis theory includes all of the following EXCEPT... 1. Photosynthetic prokaryotes evolved into chloroplasts. 2. Aerobic prokaryotes evolved into mitochondria. 3. Eukaryotic cells arose from the merging of different prokaryotic organisms. 4. All organelles evolved from specialized enfoldings of the plasma membrane.
answer
4. All organelles evolved from specialized enfoldings of the plasma membrane.
question
Which of the following is evidence for the endosymbiotic theory? **the answer can be one or more choices** I. Mitochondria and chloroplasts contain DNA similar to bacterial DNA. II. Mitochondria and chloroplasts contain ribosomes that differ from bacterial ribosomes. III. Mitochondria and chloroplasts reproduce by binary fission.
answer
I. and III.
question
Potassium-40 is useful for dating very old fossils because
answer
It has a very long half-life
question
The Cambrian Period is also called the...
answer
Age of Invertebrates
Get an explanation on any task
Get unstuck with the help of our AI assistant in seconds
New