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WorksheetsEvolution #3 MMS_2-2022
Total questions: 10
Worksheet time: 43mins
If one-fourth of the carbon-14 is remaining then how many half-lives have passed? (HINT: you don't need to look at this graph to answer the question. Think of our pie examples!)
1
2
3
4
Why do some elements have half-lives?
they radioactively decay
half of their atom gets stolen
They are Twizzlers that break in half
The wing of a butterfly and the wing of a bat are both used for flying -- but there are NO bones in the butterfly's wings. Therefore, the bat's wings and the butterfly's wings are known as ...
homologous structures.
analogous structures.
heterogeneous structures.
At the end of the Cretaceous Period, many types of species died out nearly all at once and were permanently gone from Earth. This is an example of ...
competition.
speciation.
mass extinction.
A scientist studying casts and molds in her laboratory would be working with ...
geologic time scales.
fossils.
branching trees.
NONE of the answers is correct.
Scientists compared a horse's amino acid sequence in the ABC protein to the sequence in alligators, rabbits, snakes, and turtles. They found the fewest differences between the horse and the rabbit.
This means ....
horses are not related to alligators.
snakes and turtles did not evolve from a common ancestor.
horses and rabbits evolved from a common ancestor more recently than horses and turtles or snakes.
NONE of the choices is correct.
Similarities in ____________ provides the BEST evidence that two organisms are closely related.
body structures
embryo development
fossils
DNA
