Question

A) Which of the following is an example of a vestigial organ that could be found in a transitional fossil? (1 point)
a toe that does not contribute to movement
an extra digit on both hands used for grasping
an eye that is an organism's primary way to see
a tail that is routinely used for balance
A) Tiktaalik was a prehistoric fish that was an ancestor to modern tetrapods. It shared anatomical features with tetrapods (e.g., four limbs)
and fish (e.g., gills, scales). With these features, Tiktaalik could be best described as a(n) (1 point)
transitional form.
amphibian.
fossil.
reptile.

Question 3
Question 4
A) You and your friend inspect a group of fossils from different organisms with various features. Your friend is convinced that all of the
fossils are unrelated, but you find evidence that these organisms share an ancestor. What is an example of evidence that you could use to
best support this argument? (1 point)
patterns in limb structures
heights
tooth features
number of bones
A) Which statement best describes why modern horses look the way they do? (1 point)
Aspects of horse anatomy evolved within a few generations to suit their environment.
Aspects of horse anatomy evolved over millions of years to suit their environment.
Aspects of horse anatomy evolved within a generation to suit their environment.
Aspects of horse anatomy evolved over hundreds of years to suit their environment.

Answer 1

1) a toe that does not contribute to movement

2) transitional form

3) patterns in limb structures

4) Aspects of horse anatomy evolved over millions of years to suit their environment.