WorksheetsBiology II Speciation and History of Earth
Total questions: 25
Worksheet time: 13mins
If the percentage of blue alleles in a butterfly population changes from 20% to 40%. What could you say about the population?
the population is expanding
the population is evolving
the population is decreasing
the population is not evolving
What is a change or mistake in a genetic code?
recombination
polygenic trait
single-gene trait
mutation
How is the frequency of the phenotypes for a polygenic trait (like skin color) illustrated?
scatter-plot
bell--shaped curve
pie chart
histogram
Which type of traits tend to have more phenotypes?
single-gene traits
polygenic traits
Which type of selection?
Stabilizing
Disruptive
Directional
What type of selection?
Directional
Stabilizing
Disruptive
What type of selection?
Disruptive
Directional
Stabilizing
What is isolation of a group by barriers called?
Temporal Isolation
Behavioral Isolation
Genetic Isolation
Geographic Isolation
What is necessary for the creation of a new species?
reproduction at different times
geographic barriers
different mating behaviors
reproductive isolation
What defines a species?
Temporal isolation
Geographic isolation
Mate and produce offspring
Identical genes
What would happen if some members of a species mated at different times?
behavioral isolation
geographic isolation
temporal isolation
genetic drift
Why does geographic isolation increase differences between two groups?
stops interbreeding between the populations
stops interbreeding within each population
causes temporal isolation
increases differences in courtship behaviors
If two species breed at different times of the year what can be inferred?
they are geographically isolated
they are temporally isolated
they interbreed throughout the season
one will cause the other to go extinct
Why do we only have few fossils of the earliest species?
they had hard shells that broke easily
they were large and eaten after death
they were soft-bodied and tiny, so unlikely to fossilize
they only lived in volcanic regions and were destroyed by lava
The Cambrian explosion resulted in the evolution of the first...
dinosaurs and mammals
representatives of most animal phyla
bacteria
land animals
Ancient chordates are thought to be closely related to
spiders
earthworms
octopi
sea stars
What were the dominant land animals in the Jurassic and Cretaceous periods?
amphibians
dinosaurs
grazing mammals
human ancestors
What problems would a primate have if it was blind in one eye?
Distinguishing between objects based on color
Seeing the full range of colors
Estimating distance
Holding an object
A primate's ability to hold things in it's hands or feet is a development that originally allowed
bipedalism
use of simple tools
gathering food
creation of elaborate social systems
If a primate did not have a flat face and forward facing eyes, it would lack
the ability to form family groups
the ability to grip branches
the ability to manipulate tools
the ability to judge the location of tree branches
What structure in primates enables them to develop complex social systems?
well-developed brain
long tail
thumbs and big toes
skeleton designed for climbing
How did researchers conclude bipedalism from fossils?
broad rib cages
skulls with flat faces
opposable thumbs
bowl-shaped pelvises
How did the species Homo habilis get it's nickname "Handy man"?
has opposable thumbs
was found with stone tools
was found with cooking vessels
had an extra finger on each hand
How could you determine if 2 species lived in the same time period?
If they look exactly the same
If they live in the same place
If the fossils are found in the same rock layer
If they both used tools
What is true about Homo sapiens?
they have the largest brain of all hominin species
they are the last remaining hominin
they have been extint for 1 million years
they replaced Homo habilis in Europe
