AcDec Science 2

What is the significance of phenotypic variation in a population?

• It has no impact on survival.

• It reduces the chance of adaptation.

• It increases the likelihood of survival.

• It leads to uniformity.

What does the term "genotype" refer to in the context of evolution?

• Physical appearance

• Genetic makeup

• Behavioral traits

• Environmental adaptation

Which organisms are shown to have appeared 300 million years ago?

• Amphibians

• Reptiles

• Birds

• Mammals

What is the fossil record primarily composed of?

• Living organisms

• Remains of extinct plants and animals

• Water and minerals

• Air and gases

What happens to most organisms after they die?

• They become fossilized immediately

• They decompose fairly rapidly

• They remain unchanged

• They turn into minerals

What is one of the intervals in the geologic time scale marked by?

• The extinction of dinosaurs

• The invention of the wheel

• The discovery of fire

• The rise of mammals

What is thought to have caused the mass extinction at the end of the Paleozoic Era?

• Meteor impact

• Ocean circulation shutdown and volcanic eruption

• Ice age

• Human activity

What is the time period for the Triassic-Jurassic extinction?

• 440 million years ago

• 365 million years ago

• 201 million years ago

• 66 million years ago

What is the minimum number of species in the tropical rainforest mentioned in the text?

• 1 million

• 5 million

• 10 million

• 20 million

What does the variable Z represent in the species loss formula?

• Rate of habitat destruction

• Rate at which species numbers vary by area

• Total number of species

• Area of forest before logging