Ch15 - Genetics and Evolution

Mutations are important because they bring about

• death of the organism in which they develop

• genetic variation needed for a population to evolve

• benefits for the individual, not for the population

• behavioural changes necessary for natural selection

Which of these describes a species that has become extinct?

• fewer members of the species are dying than being born

• more members of the species are dying than being born

• very few members of a species are alive, most have died.

• all members of a species have died

According to most scientists, what is the ultimate cause of most mass extinctions?

• overhunting

• evolution of new species to replace old ones

• major change in environment

• asteroid impact

Humans are causing extiction in which ways?

• By over hunting animals for food or products.
• By destroying the natural habitat of species.
• By polluting the environments of the world.
• All of the above.

Tags

NGSS.MS-ESS3-3

NGSS.MS-LS2-4

True or False? Many scientists think that an asteroid caused the dinosaurs to go extinct.

• True

• False

Tags

NGSS.MS-ESS2-3

NGSS.MS-LS4-1

What is a mass extinction?

• When all the species in a particular area on earth suddenly go extinct
• When multiple species from all over the earth suddenly go extinct 
• When one species goes extinct due to habitat changes
• When all life on earth is wiped out 

Tags

NGSS.MS-LS4-1

What event marks the end of each geologic area?

• 1 million years
• burst of new life forms
• mass extinction
• ice age

Tags

NGSS.MS-ESS1-4

NGSS.MS-LS4-1

When organisms are better adapted to their environment they will survive and reproduce more successfully than organisms less adapted. This process is called what?

• Selective breeding

• Natural Selection

• Cloning

• Artificial Selection

What scientist gave us the system of classification we still use today?

• Mendel
• Linnaeus
• Darwin
• Watson

Choose all that apply. Fossils are great clues to life in the past. However, they have limitations. Some of those limitations are:

• We have fossils for only 1% of species believed to have lived - incomplete record.

• They are fragile and break easy loosing any evidence we have.

• They do not show us internal structures.

• They are too deep in the Earth to find.