WorksheetsAdaptations U2L6
Total questions: 13
Worksheet time: 7mins
An older organism which two or more different species evolved from is known as ________________________.
a common ancestor.
an embryo.
anatomy.
natural selection.
Check all of the traits a lizard and a pigeon have in common according to the diagram:
Jaws
Lungs
Claws
Feathers
Mammary glands
According to the diagram, which one of the following traits would the common ancestor of a crocodile and an amphibian have?
Hair
Bony skeleton
Amniotic eggs
Eggs with shells
Which number would be the most recent common ancestor of amphibians and crocodiles?
1
2
5
They do not share a common ancestor
Which species is most closely related to Taxidea taxus?
Lutra lutra
Panthera pardus
Canis latrans
Canis lupus
According to this evolutionary tree, which organism is most distantly related to humans?
Fish (pink)
Frog (purple)
Salamander (green)
Mouse (blue)
Humans, birds, whales, and lizards all have similar arm bones. What is a possible reason for this?
The function of these bones is the same in all animals
They live in similar environments
They have a common ancestor
All organisms resemble humans
The more similar the stages of embryonic development, the more likely that organisms share ____________
a common ancestor.
embryos.
traits when adults.
parents.
When scientists see similarities between a hippopotamus embryo and a rabbit embryo, this suggests:
Rabbits evolved from hippopotamus.
Hippopotamus share a common ancestor with rabbits.
Hippopotamus evolved from rabbits.
Hippopotamus and rabbits share the same traits.
According to the images shown, which species would be most closely related?
calf and rabbit
fish and human
pig and tortoise
salamander and chick
Human embryos have gill slits during early development. What is the best explanation for this?
Humans are technically considered fish in the earliest stages of development.
This is how all embryos breathe before lungs develop.
It is a common mutation found in most vertebrate species.
Humans and fish share a common ancestor which has gill slits.
TRUE or FALSE: If two organisms share similar traits, this means they are always closely related.
True
False
TRUE or FALSE: Scientists only need to use one type of evidence to determine how closely or distantly related organisms might be to each other?
True
False
