B.U1 Pre-Assessment

Which of the following is a situation that could lead to the extinction of a species?

• increased habitat

• increased food supply

• increased competition

• increased population size

Which of these answers best describes a fossil?

• thick layers of rock

• organism from which other organisms are descended

• body of an organism that died recently but has not decomposed

• remains of a once-living organism found in layers of rock, ice, or amber

Which of these best describes the tiny leg bones that some whales have, which do not aid in their movement or serve any other function?

• structures that grows and improves in function as they are used

• structures that will become adaptations when the environment changes

• structures that have lost all or most of their function over evolutionary time

• structures that function at certain times of the year or under certain conditions

What is a mass extinction?

• the death of one member of a species

• the death of every member of a species

• the death of select members of a species

• the death of all members of many different species

What is the genetic material that organisms pass on to their offspring when they reproduce?

• DNA

• food

• cells

• energy

This organism lived during which major division of geologic time?

• Precambrian

• Paleozoic

• Mesozoic

• Cenozoic

How does relative dating help determine the age of a fossil?

• It gives us the exact date an organism lived.

• It allow us to study the radioactive elements to determine the age.

• It determines whether a fossil formed before or after another fossil.

• It compares a fossil with its current living relatives and studies the differences.

This organism receives plenty of water and clean air. What else does it need to survive?

• food

• a place to live

• similar organisms

• warm temperatures

How did photosynthesizing prokaryotes that lived during Precambrian time help life on Earth become more diverse?

• They reproduced quickly.

• They became other organisms.

• They made conditions more favorable by enriching the soil.

• They made conditions more favorable by increasing the amount of oxygen.

Some living things are able to tolerate life in hot springs. To which of the following domains would these organisms most likely belong?

• Archaea

• Protista

• Eukarya

• Bacteria