History of life and evolution

Scientists estimate the age of the Earth to be

• 46 million years

• 4.6 million years

• 4,600 years

• 4.6 billion years

Carbon 14 is sometimes used to date organisms its half life is

• 5,730 years

• 17,190 years

• 11, 460 years

• cannot be determined

The syrphid fly's yellow and black coloration resembles that of stinging insects protecting it from predators. This is an example of

• vestigial structures

• homologous structures

• camouflage

• mimicry

Mammals along with flowering plants first appeared during the

• Precambrian era

• Paleozoic era

• Mesozoic era

• Cenozoic era

Amphibians and reptiles along with land plants appeared first in the

• Precambrian era

• Paleozoic era

• Mesozoic era

• Cenozoic era

Scientists theorize that early Earth's atmosphere lacked what gas?

• water vapor

• methane

• oxygen

• carbon dioxide

Sickle cell anemia gives a person immunity to malaria. If a vaccine was developed for malaria you could expect the frequency of the sickle cell allele to

• decrease

• increase

• remain the same

In the fifties northwest fisherman were paid by weight rather than number of individual fish. The use of a net designed to selectively catch larger fish increased. The net effect of the fish population over time was most likely that

• Average fish body size increased

• Average fish body size decreased

• Average fish body size remained the same

Considering that 98% of all organisms that have ever lived on Earth are no longer here which of the phrases seems most appropriate

• Adapt or die

• Learn from yesterday, live for today, hope for tomorrow

• Tomorrow ain't as bad as it seems

• Appearances are deceptive

Natural selection can best be described as the

• Survival and reproduction of organisms best adapted to the environment

• Survival of the biggest and strongest organisms

• Survival and reproduction of the organisms with the largest territories

• Elimination of the smallest organisms by the largest organisms