Click each cell and answer the question that follows.
The game screen displays cells divided into rows and columns. To play the game, click any cell and a question is asked. Type the answer in the box provided and click the Submit button to submit your answer. Your score is updated on the score board on the right.
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An example of __________ is that marsupials live on distant continents that were joined long ago.
Codon GCA specifies alanine in most all organisms. This is an example of __________ homology.
Compared to the simple species found deep in the fossil record, newer species are more __________.
Evidence of common ancestry can be found in the __________ record.
The fossil record holds the remains of __________ organisms under the remains of younger organisms.
The theory that all organisms descended from the same ancestor is called __________ __________.
A giraffe's long neck helps it reach food. It is an __________ that helped its ancestors survive.
Natural selection affects the traits of populations, not individual __________.
Favorable traits are those traits that help an organism survive and/or __________.
A change in a population's gene pool that is caused by chance is called genetic __________.
A change in a population's gene pool caused by the movement of organisms is called gene __________.
Recombination during meiosis and genetic mutations increase genetic __________.
A __________ tree depicts evolutionary history, showing when (and from what species) species arose.
All organisms in the protist kingdom belong to the __________ domain.
All organisms in the Usidae family belong to the __________ phylum.
On a phylogenetic tree, species on the same branch will have similar __________.
Organisms are classified based on their __________ and differences.
What is the genus of the grizzly bear?
A unicellular organism has chloroplasts and other organelles. It belongs to the __________ kingdom.
An organism gets its food (energy) from other organisms. It is a(n) __________troph.
The four kingdoms in the eukarya domain are protist, fungi, __________, and animal.
The species in an order have __________ in common than the species in a class.
The three domains are archae, __________, and eukarya.
There are fewer species in an organism's __________ than in its family.
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