WorksheetsComparative Embryology
Total questions: 18
Worksheet time: 9mins
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.
An embryo can include the following.
A plant in the early stages of development.
A bacteria in the early stages of development.
An animal in the early stages of development.
A newly hatched egg.
How does embryology support the Theory of Evolution?
It shows that embryos who develop similarly share a common ancestor
It shows that embryos who develop similarly are not related to one another
It shows that organisms have the ability to evolve, or change, over time
When vertebrates are in the early stages of development (an embryo) they all possess....
gill slits and tails
backbone and hands
hands and feet
tongue and mouth
What is an embryo?
An early stage of development of a multicellular organism.
A sex cell that begins to grow and diversify.
The genome of an organism before birth.
The fluid sac surrounding a developing organism in its earliest stages.
In stage 2 (middle row) fish embryos _________
are very different from bird and mammal embryos.
are still very similar to bird and mammal embryos.
show arm and leg buds.
are the only embryos with tails.
According to the images shown, which species are most related?
calf and rabbit
fish and human
pig and tortoise
salamander and chick
According to the images shown, which species are least related?
rabbit and calf
fish and salamander
tortoise and chick
human and fish.
How is comparative embryology used as evidence for evolution?
The similarities in development across organisms show how they are related.
The development of embryos shows evolution occurring in organisms before birth.
The similarities of embryos shows that all organisms used to once look like each other.
Comparative embryology is not used as evidence for evolution.
Human embryos have gill slits during 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.
It is an ancestral trait preserved in an organism's development.
What can be concluded from the diagram shown?
The more closely related the organisms are, the easier it is to tell them apart at an early embryonic stage.
The more closely related the organisms are, the harder it is to tell them apart at an earlier stage.
All organisms are equally related, and can be told apart from an early stage.
None of the organisms are related, and can be told apart at all stages.
Which of the following do mammals, including humans, have during embryological development?
Scales
Gill Slits
Fins
Tail
