Embryonic Similarities Stemscopes

Which organism is most like the tortose?

• Fish
• Chick
• Salamander
• Human

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An organism that hasn't been born or hatched yet is called a________.

• alien
• ember
• embryo
• planet

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Embryos look the most similar across different species during the early stages of developement.

• True
• False

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Embryos are used as evidence for_______.

• mutations
• artificial selection
• evolution/common ancestry
• embryos

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Human embryos have _________, and human adults don't

• arms
• gills
• hard shell
• beak

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Which organism on this picture looks the most similar to the human?

• Fish
• Salamander
• Chicken
• Rabbit

This image shows the development of two embryos.

Based on these images, which statement is true?

• Their brains will function the same way after birth.

• Their tails and legs are different as embryos.

• Their eyes and heads are similar as embryos

• Their legs will be the same length at birth.

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These forelimbs are considered to be evidence of common ancestry because of which of the following?

• They have the same functions.

• They are all from mammals.

• They contain similar structures.

• They all are all the same basic length.

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If species A and B have very similar genes and proteins, what is probably TRUE?

• species A and B share a relatively recent common ancestor
• species A evolved independently of species B for a long period
• species A is younger than species B
• species A is older than species B

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The process by which populations slowly change over time is called

• selective breeding
• adaptation
• speciation
• evolution

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