Which of the following observations most strongly supports evoluntionary links between fossil organisms and modern organisms?
A. Fossil organisms and modern organsims have identical body sizes
B. The fossil organisms and modern organisms have homologous structures
C. The fossil organisms are hundreds of thousands of years old and modern organisms have been around for hundreds of years
D. The fossil organisms are found in many different rock layers, and modern organisms live in different habitats
The embryos in the picture look similar. The embryos have similar features and structures. Does this suggest that the embryos have a common ancestor?
Yes
No
Question 3
3.
Question 4
4.
Question 5
5.
Question 6
6.
For 8 to 13. Identify the example as homologous, analogous, vestigial or as embrology
Question 7
7.
Question 8
8.
Question 9
9.
Question 10
10.
Question 11
11.
Question 12
12.
Question 13
13.
How many differences are there between the human and the chicken (count the number of highlighted sequences)
Question 14
14.
How many differences are there between the human and the horse (count the number of highlighted sequences)
Question 15
15.
How many differences are there between the human and the tuna (count the number of highlighted sequences)
Question 16
16.
How many differences are there between the human and the
monkey (count the number of highlighted sequences)
Question 17
17.
Question 18
18.
Question 19
19.
Look at the butterfly and bird wing. What is the function of these structures?
communication
fly
to gather food
protection
Click on all the structural differences between butterfly and bird wings
birds have feathers
birds have bones
wings purpose is to fly
Butterflies and birds wing both have the same purpose but very different structure. These structures are analogous. Do analogous structures show common ancestry?
Yes
No
Why might cave fish have evolved without eyesight?
Cave fish lost their eyes in an epic battle
Cave fish lost their eyesight due to an illness
Caves are dark, so eyesight is not necessary for surivival
Cave fish are not actually fish
The wings of bats and birds are both used for flight but have different structures. Birds and bats are not related
A. homologous
B. analogous
C. vestigial
D. embryology
Snakes have little leg bones that have no function
A. homologous
B. analogous
C. vestigial
D. embryology
The embroys of humans, fish, and salamanders have common features. This indicates a common ancestor.
A. homologous
B. analogous
C. vestigial
D. embryology
Whales have a pelvis and little femur bones even though they do not have legs.
A. homologous
B. analogous
C. vestigial
D. embryology
Horses, cats, dogs, and humans have the same number of bones in the upper arm. These organisms have similar bone structure in the limbs but are used for different functions. This indicates a common ancestor.
A. homologous
B. analogous
C. vestigial
D. embryology
Dolphins and sharks have a streamlined body, flippers, and a tail however, dolphins are mammals and sharks are fish. Dolphins and sharks do not have a common ancestor.
A. homologous
B. analogous
C. vestigial
D. embryology
What organism is closely related to humans?
chicken
horse
tuna
monkey
What organism is least closely related to humans?
chicken
horse
tuna
monkey
What is the BEST evidence to support evolution and common ancestory?
