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WorksheetsCommon Ancestors
Total questions: 20
Worksheet time: 20mins
Based on the diagram, which letter represents the common ancestor shared by the Frog and Parrot?
B
C
D
E
F
Based on the diagram, which letter represents the common ancestor shared by the Human and Hare?
B
C
D
E
F
Based on the diagram, which letter represents the common ancestor shared by the Tuna and Hare?
B
C
D
E
F
Based on the diagram, which animal is most closely related to the hare?
shark
frog
human
caiman
parrot
Based on the diagram, which animal is most distant relative to the caiman? (least closely related)
shark
frog
human
caiman
parrot
Based on the diagram, when did the Panda Bear and Polar Bear share a Common Ancestor?
1 mya
2 mya
3 mya
5 mya
6 mya
Based on the diagram, what letter represents the common ancestor shared by the Sloth Bear and Sun Bear?
A
C
D
E
G
Based on the diagram, the Brown Bear shares a more recent common ancestor with ____.
Polar bear
American black bear
Asian Black Bear
Sun Bear
Panda Bear
Based on the diagram, which two species share a more recent common ancestor?
A and B
A and C
B and C
Based on the diagram, the salamander shares a more recent common ancestor with _____ because they have the most similarities.
fish
tortoise
chicken
human
WHY do scientist think the limbs of these animals are similar?
They share a common ancestor.
They are the same species.
They use their limbs for the same function.
They are not related.
The limbs of these animals are called ____ because they are similar.
Common Ancestor
Embryo Development
Homologous Structures
Related
A past relative (extinct species) shared by 2 or more living species today.
homologous structures
species
embryo
common ancestor
stage of development before birth
homologous structures
species
embryo
common ancestor
A group of similar organisms that can breed and produce fertile offspring.
homologous structures
species
embryo
common ancestor
A bone or organ that has similar structure, but may not have the same function.
(found in different species)
homologous structures
species
embryo
common ancestor
Which animal living today is LEAST closely related to dinosaurs?
birds
crocodilians
lizards and snakes
dinosaurs
Based on the diagram, what letter represents the common ancestor shared by Pterosaurs and Birds
A
B
C
D
E
Based on the diagram, which animal are whales most closely related to?
Camel
Pigs
Ruminant (Giraffe)
Hippopotami (Hippo)
Based on the diagram, what letter represents the common ancestor shared by Pigs and Hippos (hippopotami)?
A
B
C
D
