Unit 11 Test Review

Which of the following explains why cells that contained mitochondria-like organelles had an evolutionary advantage?

• They were immune to bacteria

• They are able to use more energy

• They made predators die off

• They created life

Which evidence caused scientists to think that the first cells were anaerobic?

• There wasn't any oxygen back then

• its easier for cells to breathe

• because cells don't need oxygen

• that's how they make their own food

How is DNA evidence used to determine if organisms have a common ancestor?

• If animals have a lot of DNA in common that means they are related

• You cant use DNA to see if they are related

• They are more related if they have less DNA in common

What are homologous structures?

• Structures that are left over and aren't needed anymore

• They are used to determine how old something is

• They are similar structures that are evidence of a common ancestor

• They are used to show chromosomal differences between species

What conditions are necessary for natural selection?

• Small population

• there needs to be genetic variation

• the environment must not be changing

• the population needs to be completely identical

How does genetic recombination affect evolution?

• it decreases genetic variation and slows evolution

• it stops gene flow

• it doesnt

• it increases genetic variation by creating new genes

How does genetic drift affect a small population?

• it will create more genetic diversity

• it increases the alleles in the population

• it reduces genetic diversity

• it causes a new species to form

What were the first organisms that developed on earth?

• eukaryotic and aerobic

• prokaryotic and aerobic

• eukaryotic and anaerobic

• prokaryotic and anaerobic

Why is the Miller-Urey theory widely accepted

• because it demonstrates spontaneous generation

• there are a lot of organic molecules around

• because it's the newest

• the process was demonstrated in a lab

What type of evidence for evolution involves biochemical analysis of the organism?

• DNA

• Analogous structures

• embryology

• Fossil record