Answers PARTA - EOP PGCPS BIOGEOCHEM CR FALL2026 - 798113Evidence for Evolution

Evidence for Evolution Answers

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The diagram shows a chicken embryo and a human embryo.

Because their embryos have tails, chickens and humans do not likely share a common ancestor with fish.

Because their embryos have structures similar to gills, chickens and humans likely share a common ancestor with fish.

Chickens and humans have homologous structures as embryos, so they are not likely related to each other.

Chickens and humans have homologous structures as embryos, so they are not likely related to any other organisms.

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Monkeys and bats have similar bone structure in their forelimbs. However, monkeys have longer forelimbs to use for climbing and swinging in trees. Bats have shorter forelimbs to use for flight.Which term best describes how monkey and bat forelimbs are related to each other?

homologous

embryonic

analogous

vestigial

Houseflies have very tiny hind wings that are too small to lift them off the ground. Scientists have observed fossils of an ancient insect they believe is related to houseflies. However, these insects had second pair of wings that were much bigger.How does this show support for the theory of evolution?

Houseflies have a vestigial structure.

The ancient insects had a vestigial structure.

Both share a homologous structure.

Both share an analogous structure.

According to embryology, why do fish and birds have a common ancestor?

They both have embryos with gill slits and tails.

They both have embryos with traits that eventually disappear.

They both have embryos that develop into adults.

They both have embryos that form from a fertilized egg.

A student is writing a paper to explain how scientists interpret this image.

analogous structures

homologous structures

comparative anatomy

embryology

Which is an example of using comparative anatomy to study evolutionary relationships?

comparing and contrasting the DNA of two organisms

studying the digestive system structure in two organisms

using ancient footprints to learn about an organism’s behaviors

looking at the development of a fertilized egg of an organism

Jonas drew a diagram to compare two kinds of evidence that support the theory of evolution.

no longer used by species

link two species to a common ancestor

evidence of adaptations to similar environments

part of comparative anatomy studies

Which traits do human embryos have that link them to a common ancestor with fish and reptiles?

scales and tail

gill slits and scales

tail and gill slits

hair and tail

Embryos of different species look very similar, which shows that the organisms share a ancestor.

Answer not available

Which are accurate descriptions of comparative anatomy? Select three options.

may or may not include studies of structures with the same function

only involves studies of structures that are on the outer surface of the body

compares the structures of organisms from different species

always supports the concept of a recent common ancestor

includes studies of homologous, vestigial, and analogous structures

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