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Which is the current period of geologic time?
a mass extinction likely caused by an asteroid where over 80% of all life went extinct
mutations
genes
Cenozoic
parents
environment
helpful
4.6 billion years old
Individuals with ____________ variations are more likely to live longer and have offspring.
a mass extinction likely caused by an asteroid where over 80% of all life went extinct
mutations
genes
Cenozoic
parents
environment
helpful
4.6 billion years old
______________ are instructions for making protein molecules and proteins molecules determine an organism's traits.
a mass extinction likely caused by an asteroid where over 80% of all life went extinct
mutations
genes
Cenozoic
parents
environment
helpful
4.6 billion years old
Changes to genes that can lead to changes to protein molecules, which can result in changes to traits are called ____________.
a mass extinction likely caused by an asteroid where over 80% of all life went extinct
mutations
genes
Cenozoic
parents
environment
helpful
4.6 billion years old
Whether or not a variation is helpful depends on the __________.
a mass extinction likely caused by an asteroid where over 80% of all life went extinct
mutations
genes
Cenozoic
parents
environment
helpful
4.6 billion years old
Individual organisms inherit their genes from ________.
a mass extinction likely caused by an asteroid where over 80% of all life went extinct
mutations
genes
Cenozoic
parents
environment
helpful
4.6 billion years old
About how old do scientists think the Earth is?
a mass extinction likely caused by an asteroid where over 80% of all life went extinct
mutations
genes
Cenozoic
parents
environment
helpful
4.6 billion years old
Dinosaurs existed in the Mesozoic Era. What did this period of geologic time end with?
a mass extinction likely caused by an asteroid where over 80% of all life went extinct
mutations
genes
Cenozoic
parents
environment
helpful
4.6 billion years old
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